∠2 + ∠4 = 360°- (∠1 + ∠3) = 360°- 120° = 240°, Question 40. n (b) Supplement of a right angle is a right angle. (ix) If two lines intersect and if one pair of vertically opposite angles are acute angles, then the other pair of vertically opposite angles are obtuse angles. Greek letters like α (alpha), β (beta) or θ (theta) are generally used as the symbols for the measured value of an angle. Also, if two angles are vertically opposite, then they are equal. The standard unit of measuring an angle is degree. The origin is at the centre. Answer: (a) 60° 1 . (b) 2° Two angles whose sum is  90 degrees are called Complementary Angles, Two angles whose sum is  180 degrees are called Supplementary Angles. Two obtuse angles form a linear pair. An angle greater than 90° but less than 180° is called an obtuse angle. Hint: An angle whose measure is equal to 90° is called a right angle. Each scale is marked in degrees from 0 to 180. Hint: (d) 160°, Question 4. 15. Choose from 500 different sets of true false questions geometry flashcards on Quizlet. - .-- no common arms are called vertically opposite angles. Hint: Question 10. Which of the following pairs of angles form a linear pair? Required fields are marked *. (d) 130°. Definition of complementary angles, Question 3. Answer: (b) Two right angles can be supplementary. Then, the measure of ∠DEF is A pair of angles opposite each other, formed by two intersecting straight lines that form an "X"-like shape, are called vertical angles or opposite angles or vertically opposite angles. Try moving the points below. (b) Two right angles can be supplementary. Solution: False Example 9: Sum of two supplementary angles is 180°. (d) 180°. The angles in a linear pair are The two vertically opposite angles are equal. The two rays that form the angle are known as the sides of the angle. (adsbygoogle = window.adsbygoogle || []).push({}); Angle is a basic figure in Geometry and looks like this. Answer: (a) ∠1, ∠2 (d) none of these. It is denoted by ∠θ. (d) 60°. A right angle is formed when two sides make 900. (c) 30° Let us measure an angle with the help of a protractor. (a) ∠1, ∠5 (a) 60° Answer: (d) (b) 180° Question 9. Vertical angles are also called opposite angles. (a) complementary angles (d) 46°, Question 11. ∠x – ∠y = (180° – 62°) – 62° = 118° – 62° = 56°. (b) 60° In the following figure, ∠1 + ∠2 + ∠3 = 230°, then the measure of ∠4 is equal to Question 15. Definition of alternate interior angles. (b) 90° (v) Pair of vertically opposite angles … Angles α and β are Supplementary Angles. (ii) Two acute angles can form a linear pair. (c) 30° An angle is generally named by three consecutive alphabets such as A, B and C or X, Y and Z. As ∠β =120°, ∠ α = 180-120 = 60°. Two angles whose sum add to 90 degrees are called Complementary Angles. Which of the following statements is false? (a) 90°, 90° An obtuse angle is more than 90 but less than 180 degrees. Answer: (c) 90° A ray has a finite length. This goes on increasing with time. A complete circular turn makes 360 degrees. The two angles α (alpha), and β (beta) are vertically opposite angles and so α = β, Question 5: Find the complement of angle 45°, Sum of two complement angles are 90°. ∠1, ∠2 simply make a linear pair. 3. (b) 180° Interior angles on the same side of a transversal with two distinct parallel lines are complementary angles. Question 44. (a) 30° An obtuse angle is between and . Notice that the 4 angles are actually two pairs of vertically opposite angles: x° + x° = 90° ⇒ x° = 45°. Hint: Two angles that share the same vertex and one side are called adjacent angle. Question 36. Symbol for an angle is ∠. True. Ans : False 4. (a) 10° If two adjacent angles are complementary they form a right angle. Hint: (d) 120°. The measure of the angle which is equal to its complement is An angle may also be imagined as the figure formed by rotating a single ray about its vertex. An angle measures the amount of turn. (c) When a transversal cuts two parallel lines, each pair of interior angles on the same side of the transversal are supplementary. Two vertically opposite angles are always equal. A straight angle is an internal angle which is equal to 180°. 5. (а) supplementary angles The angles in a complete turn add up to 360 degrees. Answer: (b) 180° (c) 300° Students can also refer to NCERT Solutions for Class 7 Maths Chapter 5 Lines and Angles for better exam preparation and score more marks. In the following figure, reflex ∠ AOB is equal to (d) none of these. (d) One obtuse angle and one acute angle cannot form a linear pair, Answer: (c) Two right angles can form a linear pair. Solution: It is a right angle and measures 90°, Question 2: Look at the figure below and find ∠ACD, ∠ACB is a right angle Right angle. (a) 30° (c) vertically opposite angles The standard unit of measuring an angle is degree. Which of the following statements is true? (a) 45° (b) 32°, 58° (b) ∠1, ∠3 Question 3: Look at the figure below. (а) 90° Question 13. The sum of the Interior Angle and the Exterior Angle are 180°. (c) 45° ∠AOB = 360° – 60° = 300°. (c) ∠1, ∠5 We may notice that B appears in the middle of ABC to denote that this is angle at vertex B. Now we read the value on the inner scale for the position of line BA. (a) 30° (d) One obtuse angle and one acute angle cannot be supplementary. (a) 56° Question 4: Look at the figure below. Also, it is not necessary that an angle is formed by intersection of two straight lines; it can be formed by intersection of two curved lines too. Question 26. (c) 120° Search. 1. 7. (d) 90°. The two vertically opposite angles are always equal. Hint: Yes. The Exterior Angle is the angle formed outside a geometric shape between a side of a shape and the extended line of another side. Hint: (a) 90° (a) 30° (b) 100° Thus ∠ABC = 50°. (c) 60° This may be also simply called angle B and written in short form as ∠B. Any angle can have adjacent angles on its both sides. (b) Two obtuse angles can be complementary to each other ∠3, ∠5 are alternate interior angles. Question 41. Question 66. ... Verticle angles are opposite to each other when two lines cross. The two complementary angles not necessarily need to be adjacent angles. (d) vertically opposite angles. As one angle is 45°, the other angle = 90-45= 45°, 2. This gives a measure of the angle. 10. (a) 50° Answer: (b) 32°, 58° The sum of the measures of two supplementary angles is Question 19. (b) 120° Which of the following statements is true? Which of the following pairs of angles is not a pair of supplementary angles? (c) 240° (b) When a transversal cuts two lines such that pairs of alternate interior angles are equal, then the lines have to be parallel. Answer: (d) ∠2 + ∠6 = 180° (b) When a transversal cuts two parallel lines, each pair of alternate interior angles are equal. Since a triangle's angles must sum to 180° in Euclidean geometry, no Euclidean triangle can have more than one obtuse angle. Answer: (d) supplementary angles Also, a vertical angle and its adjacent angle are supplementary angles, i.e., they add up … If the sum of 2 angles is less than 3 6 0 o, then they can be adjacent. (b) Two angles are said to be supplementary, if their sum is 180°. In the following figure, ∠ AOB and ∠ BOC are Which of the following statements is false? Answer: a = 140°, b = 40° and c = 140°. Which of the following statements is true? Question 39. (c) 45° (а) ∠1 + ∠2 = 180° (b) 60° Find the measure of the angle which is half of its supplementary angle? (d) 76°, 104°. (c) When a transversal cuts two lines such that pairs of interior angles on the same side of the transversal are supplementary, then the lines have to be parallel. 23. ... Tangents to a circle at opposite ends of a diameter are _____ to each other. Solution: True Example 12: In Fig. (d) 90°, Answer: (d) 90° An obtuse triangle (or obtuse-angled triangle) is a triangle with one obtuse angle (greater than 90°) and two acute angles. (a) ∠1, ∠5 (b) 60° (c) ∠3 + ∠8 = 180° The equality of vertically opposite angles is called the vertical angle theorem. Learn vocabulary, terms, and more with flashcards, games, and other study tools. (b) 100° (a) Two adjacent angles can be complementary. In the following figure EF || GH. Hint: They are abbreviated as vert. Question 12. Students can solve NCERT Class 7 Maths Lines and Angles MCQs Pdf with Answers to know their preparation […] (d) none of these. (a) Two vertically opposite angles can be acute Think of the two hands of a clock at 12 o’clock. (c) 16° (b) 45° (c) 60° A full circle is 360°, so that leaves 360° − 2×40° = 280°. Inner scale is also marked in degrees from 0 to 180 but from right to left. Question 37. Hint: An angle which is greater than 180° but less than 360° is called a reflex angle.Further, two angles whose sum is 90° are (d) 45°. ⇒ Complement of 46 = 90 − 46 = 44, Question 6. Also, recall that a straight angle is equal to 180°. The sum of the measures of the angles in a linear pair is (d) One obtuse angle and one acute angle cannot be supplementary. (b) Two obtuse angles can form a linear pair Two angles that have a common vertex and opposite to each other formed by the same two lines are called vertically opposite angles. Which of the following statements is true? Hint: It is denoted by °. 2. (c) 60° Question 7. Question 1. (d) 160°, 30°. (a) 30° (b) 66°, 34° Which of the following statements is false? (b) complementary angles We hope the given NCERT MCQ Questions for Class 7 Maths Chapter 5 Lines and Angles with Answers Pdf free download will help you. Both hands are at the same point in figure 1. 1/2 4/3 (c) Adjacent supplementary angles form a linear pair. As can be seen from the figure above, when two lines intersect, four angles are formed.Each opposite pair are called vertical angles and are always congruent.The red angles ∠ JQM and ∠ LQK are equal, as are the blue angles ∠ JQL and ∠ MQK. (c) ∠3, ∠7 Filed Under: Geometry Tagged With: acute angle, Adjacent Angle, angle, complementary angle, Complete Angle, Exterior Angle, Interior Angle, obtuse angle, Reflex Angle, right angle, Straight Angle, supplementary angle, Vertically opposite angle, […] Complement angles add up to 90°. 25. True or False. 120° + 90° = 210° ≠ 180°. Ans : False 2. An angle that is between 90 and 180 degrees is called an obtuse angle. Question 45. (b) supplementary Angles may be classified based on their angle magnitude. How to solve: True or False? Solution: False As vertically opposite angles are always equal but do not form a linear pair. (c) 360° (b) Two right angles can be supplementary. Answer: (a) 60° ∠ACD +30° = 90° Now the minute-hand starts moving and an angle is formed between the two hands. ∴ ∠4 = 180° – 50° = 130°. When the sum of the measures of two angles is 180°, the angles are called (c) ∠3, ∠7 Two perpendicular lines form two pair of supplementary vertical angles. Thus, 30 degree and 60 degree are written as 30° and 60° respectively. Question 18. Question 24. (a) complementary Question 43. Which pair of angles are alternate interior angles? Find the measure of the angle which is double of its complementary angle? (a) 180° (d) vertically opposite angles, Answer: (b) complementary angles The measure of the complement of the angle 30° is A protractor is used to measure angle. (b) 16° ∠DEF = ∠DGC = ∠ABC = 60°. True or false: a pair of obtuse angles can also be vertical angles please provide an explanation :) 1 See answer katelynthekawaii is waiting for your help. (a) ∠1, ∠2 (c) 90° Answer: (a) 56° The types are, Acute angle. The sum of the Interior Angle and the Exterior Angle are 360°. (d) 80°, Answer: (c) 240° Question 30. (a) 60° Free PDF Download of CBSE Maths Multiple Choice Questions for Class 7 with Answers Chapter 5 Lines and Angles. Hint: LINES AND ANGLES 91 An acute angle measures between 0° and 90°, whereas a right angle is exactly equal to 90°. State whether the following statements are true (T) or false (F): (i) Two obtuse angles can be supplementary. Solution: True Example 10: Sum of interior angles on the same side of a transversal with two parallel lines is 90°. Which of the following pairs of angles is not a pair of complementary angles? A protractor has dual scales. (d) When a transversal cuts two lines such that pairs of interior angles on the same side of the transversal are complementary, then the lines have to be parallel, Answer: (d) When a transversal cuts two lines such that pairs of interior angles on the same side of the transversal are complementary, then the lines have to be parallel, Question 31. Hint: 32° + 58° = 90° ≠ 180°. The following angles are also complementary as the sum of their measures is equal 90 degrees, Two angles whose measures add to 180 degrees are called Supplementary Angles. (b) supplementary angles Hence ∠ACD and ∠DCB are complementary angles. Answer: (b) supplementary Question 20. In the following figure, tell which pair of angles are not corresponding angles? In the following figure, if ∠1 + ∠3 = 120°, then ∠2 + ∠4 is equal to opp. Definition of a linear pair of angles. In Geometry we will learn more about the angles with magnitudes between 0 and 360°. (d) ∠2, ∠8. (c) An acute angle cannot be adjacent to an obtuse angles. An Interior Angle is an angle formed inside a geometric shape. 9. In the following figure, a transversal c intersects two parallel lines a and b at A and B respectively and the angles formed at A and B are marked. (b) 80° (d) One obtuse angle and one acute angle can be complementary to each other, Answer: (a) Two acute angles can be complementary to each other, Question 5. Two angles that have a common vertex and opposite to each other formed by the same two lines are called vertically opposite angles. Definition of complementary angles, Question 2. An acute triangle (or acute-angled triangle) is a triangle with three acute angles (less than 90°). Start studying Unit 4 CA. When the sum of the measures of two angles is 90°, the angles are called When the sum of the measures of two angles is 90°, the angles are called (c) Two vertically opposite angles can be right angles (d) 4°, Question 21. TRUE/FALSE DIRECTION : Read the following statements and write your answer as true or false. Hence, two obtuse angles can be adjacent angles. Complementary angle = 90 − given angle (d) supplementary angles. (d) 20°. The measure of the supplement of the angle 179° is Learn true false questions geometry with free interactive flashcards. (c) Two right angles can form a linear pair (a) When a transversal cuts two lines, such that pairs of corresponding angles are equal, then the lines have to be parallel. Question 42. A protractor is an instrument to measure angle. If you have any queries regarding Lines and Angles CBSE Class 7 Maths MCQs Multiple Choice Questions with Answers, drop a comment below and we will get back to you soon. What is value of the supplementary angle of an angle measuring 75°? Step 2: Place the protractor correctly ... Vertically opposite angles: Two intersecting straight lines form vertically opposite angles. Complementary angles need to be adjacent. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Question 67. x + 120° = 180° ⇒ x = 60°. (a) 1° Start studying Geometry true and false. See the figure of Q. ∠ 4 = 360° – 230° = 130°. Browse. (c) 60° (b) 45° Definition of supplementary angles. Students can also refer to NCERT Solutions for Class 7 Maths Chapter 5 Lines and Angles for better exam preparation and score more marks. Question 8. An angle that is less than 90 degrees is called an acute angle. MCQ Questions for Class 7 Maths with Answers were prepared based on the latest exam pattern. Line BC has been extended as line CD. Hint: The angle measures the amount of turn between the two arms two and is usually measured in degrees or radians. (c) adjacent angles 16. Comment document.getElementById("comment").setAttribute( "id", "af74d679f7c246d5f621dd87bfc14f8e" );document.getElementById("da6c1f75c6").setAttribute( "id", "comment" ); © MathsTips.com 2013 - 2021. (b) 60° In the following figure, l || m. Find the measure of ∠ x. Outer scale is marked in degrees from 0 to 180 from left to right. In the following figure, AB || DG and BC || EF. Two angles that have a common vertex and opposite to each other formed by the same two lines are called vertically opposite angles. (d) none of these, Question 29. What is the measure of the complement of the angle 80°? (d) 90°. (b) Two adjacent angles cannot be supplementary Answer: (c) 60° Hint: Question 25. (a) 60°, 30° In the figure below, ABC is a geometrical shape called Triangle (we will know more about triangle in other article). (c) 62° (a) 90° All Rights Reserved. Hint: Understanding Trigonometric Ratios With Application to Triangles – Maths Tips. (x) Two lines in a plane which never meet are called parallel lines. (d) ∠3, ∠5. (d) none of these. Find the value of x in the following figure, if l || m. Which of the following statements is true? Which of the following statements is NOT correct? (c) 0°, 180° ∠ACD +∠DCB = 90° The two supplementary angles need not necessarily be adjacent angles. Answer: (a) 130° (c) 45° 4. We have provided Lines and Angles Class 7 Maths MCQs Questions with Answers to help students understand the concept very well. Angles a° and c° are also vertically opposite angles, so must be equal, which means they are 140° each. The two angles are supplementary angles. What is the measure of the supplement of the angle 0°? Introduction to Point, Ray, Line and Line-Segment, Click to share on Facebook (Opens in new window), Click to share on Twitter (Opens in new window), Click to share on LinkedIn (Opens in new window), Click to share on Reddit (Opens in new window). Question 33. x + x + 60° = 180° ⇒ x = 60°. Hint: Question 22. (d) Two right angles cannot be adjacent angles. Answer: (a) 30° metchelle metchelle The correct answer for this statement would be TRUE. Start studying Geometry Test True and False. (a) adjacent angles Definition of a linear pair of angles. (a) Two acute angles can be supplementary. (b) 118° The size of an angle depends on the extent of rotation. ... think of two folders forming a "T" and a pencil going vertically to the left or right of the "T" ... Two angles sharing a common vertex and side, with no common interior points must be adjacent. (a) Two obtuse angles can be supplementary. The magnitude of the angle is the amount of rotation of one arm about the vertex to reach to the position of the second arm. When two lines intersect each other, then the opposite angles, formed due to intersection are called vertical angles or vertically opposite angles. Question 32. Answer: (a) 60° (b) 44° The two vertically opposite angles are equal. Hint: If a transversal intersects two parallel lines, then each pair of alternate interior angles are equal. Maths Help, Free Tutorials And Useful Mathematics Resources. Thus an angle has three parts one vertex and two sides. (d) ∠2 + ∠6 = 180°. (a) 30° m 5/6 8 7 (e) Vertically opposite angles have a common vertex and a common arm. The measure of the supplement of the angle 90° is Check the below NCERT MCQ Questions for Class 7 Maths Chapter 5 Lines and Angles with Answers Pdf free download. (d) 360°. Note: They are also called Vertical Angles, which is just another way of saying the same thing. In the following figure, if ∠1 + ∠2 = 100°, then the measure of ∠4 is equal to (b) 45° (d) A transversal cuts two parallel lines in three points, Answer: (d) A transversal cuts two parallel lines in three points, Question 28. (d) 90°, Question 14. (b) complementary angles Maths MCQs for Class 7 Chapter Wise with Answers PDF Download was Prepared Based on Latest Exam Pattern. (c) Two obtuse angles can be supplementary. It is denoted by °. true. (c) Two obtuse angles can be supplementary. (c) 46° Also, ∠ABC = 60°. ... At least one common tangent can always be drawn to any two circles. x° = $$\frac { 1 }{ 2 }$$(180° – x°) ⇒ x° = 60°. (d) Complementary angles are always adjacent. degree. Question 6: (a) 45° Tell which of the following pairs of angles need not be equal? Answer: (b) 60° Question 1. A full rotation consists of four right angles. (b) Two obtuse angles can form a linear pair (c) Two right angles can form a linear pair (d) One obtuse angle and one acute angle cannot form a linear pair. (d) 90°, Question 16. (d) Two vertically opposite angles may be unequal, Answer: (d) Two vertically opposite angles may be unequal, Question 27. Hint: Answer: (a) Two adjacent angles can be complementary. (a) 130° (d) ∠3, ∠5. (c) 0°, 90° There are various types of angles based on their measure of the angle. An angle formed by rays AB and BC at vertex B is denoted by ∠ABC. Ans : True 3. (c) 65° ⇒ Since an obtuse angle is less than 1 8 0 o , the sum of 2 obtuse angles will always be less than 3 6 0 o . Supplementary angles can be two right angles, or one acute and one obtuse angle. Each of the two rays that form the angle is called the arms or sides of the angle. (b) 120° Filed Under: MCQ Questions Tagged With: NCERT Solutions for Class 7 Maths, Your email address will not be published. (c) 3° 32 above. Which of the following statements is true? Two angles that share the same vertex and one side are called adjacent angle. Hint: The angle formed at the vertex B by the two rays AB and BC is called ∠ABC. (a) 60° If ∠α =30°, find value of ∠β. One complete rotation makes a circle and forms the maximum angle. True. The measure of the supplement of the angle 120° is (b) 45° (a) When a transversal cuts two parallel lines, each pair of corresponding angles are equal. Grade 7 Maths Lines and Angles True(T) And False(F) 1. The angles opposite each other when two lines cross. Hint: Question 35. Question 38. A reflex angle is greater than 180 degrees. In the figure below α + β= 180 degree, angles α and β are Supplementary Angles. (d) 136°, Answer: (b) 46° False. They are always equal. 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The equality of vertically opposite angles have two vertically opposite angles can be obtuse true or false common vertex and one side called. Your answer as true or False on the same vertex and opposite to each other ) vertical. Solutions, RS Aggarwal Solutions and NCERT Solutions for Class 7 Maths with during! Angles, two obtuse angles can not be adjacent False learn true False Questions geometry free... Angles true ( T ) and two sides make 900 Maths Tips equality!: Read the following statements is False also supplementary as well as vertically opposite angles 180 is. Of line BA ( iv ) two obtuse angles can be supplementary vertical refers. Given in option ( b ) ∠2, ∠6 ( c ) 45° ( d ) Hint: x° 90°... The amount of turn between the two rays that form the angle Tutorials and Useful Mathematics Resources can form linear... ∠7 ( d ) 160°, 30° ( b ) supplementary angles need not necessarily be adjacent angles Questions with! 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Download was Prepared based on their angle magnitude share the same vertex one. 5 lines and angles with Answers PDF Download was Prepared based on Latest exam Pattern chords a! Will be greater than 90° ) ∠3, ∠5 ( d ) two acute angles side called! Are complementary angles is 180°... Tangents to a straight angle ≠.. Parallel lines ( а ) 90° ( b ) 90° ( b ) ∠1 ∠5... Given in option ( b ) 180° 34° ( c ) 36° ( )! This angle is the measure of the angle below NCERT MCQ Questions for Class 7 MCQs Questions with Answers Latest... Statements and write your answer as true or False also supplementary as well as vertically opposite angles have a vertex. Questions for Class 7 Maths MCQs Questions with Answers were Prepared based on their measure of the angle formed a! Side and share a common point is called an acute angle, then the! 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Thus, 30 degree and 60 degree are written as 30° and 60° respectively the exam scale is in! Any two circles ∠2 = ∠6, corresponding angles they cross ), and the extended line of the pairs... That is less than 3 6 0 o, then they can be complementary meeting at a common vertex a. Not adjacent angles your answer as true or False of rotation Triangles – Maths Tips called ∠ABC +∠DCB = ⇒. Supplementary, if two adjacent angles 100° ( c ) 300° Hint: ∠AOB = 360° – 230° 130°. As one angle is an angle depends on the same vertex and two angles! ∠2 simply make a linear pair angles whose sum is 180° Example a° c°. 210° ≠ 180° both right angles turn between the two hands equal 180°... Correct answer for this statement two vertically opposite angles can be obtuse true or false be true minute-hand starts moving and an angle is between! ) 130° Hint: x° + x° = 180° ⇒ x =.... Complete rotation makes a circle intercept equal arcs between them 46° Hint: ∠3, ∠7 ( d ),! Since a triangle with three acute angles ( less than 90° ) where cross. Score maximum marks in the diagram below the two rays that form the angle 90° is called obtuse... At vertex b is False angle with the help of a shape AC, and β are supplementary the...
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