Lines and Angles

Class 9 · Mathematics

67 questions30 easy22 medium15 hard

Sample Questions

Q1.Adjacent angles share:

  • AA common vertex and a common arm
  • BOnly a common arm
  • COnly a common vertex
  • DA common interior

Q2.An angle equal to 180° is called:

  • AObtuse angle
  • BComplete angle
  • CReflex angle
  • DStraight angle

Q3.Three lines l, m, n are concurrent. How many angle pairs are vertically opposite at the point of concurrency?

  • A2
  • B3
  • C6
  • D9

Q4.In the figure, if ∠AOB = 40°, what is ∠BOA' where A' is opposite to A through O (i.e., angle on line)?

  • A40°
  • B140°
  • C90°
  • D50°

Q5.An angle between 90° and 180° is called:

  • AAcute angle
  • BObtuse angle
  • CReflex angle
  • DRight angle

Q6.This is a sample question to preview what you'll get in the full practice test...

  • A. Option one
  • B. Option two
  • C. Option three
  • D. Option four
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Concepts Covered

Adjacent anglesAlternate interior anglesAngle sum of triangleCo-interior anglesCorresponding anglesLinear pairParallel linesTransversalTypes of anglesVertically opposite angles

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