Olympiad – Class VII – Mathematics - Lines and Angles

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Question - 1

Which of the following are the units of an angle?

  • A Seconds
  • B Kilograms
  • C Degrees
  • D Kilometres

Question - 2

What do we call an angle which exactly measures 90°?

  • A An obtuse angle
  • B An acute angle
  • C A right angle
  • D A reflex angle

Question - 3

What do we call an angle whose measurement is exactly equal to 0°?

  • A An obtuse angle
  • B A straight angle
  • C A zero angle
  • D A right angle

Question - 4

What is an angle which measures exactly 180° called?

  • A A zero angle
  • B A right angle
  • C A straight angle
  • D An acute angle

Question - 5

Which instrument is used to measure or construct angles?

  • A Compasses
  • B Scale
  • C Protractor
  • D Set squares

Question - 6

How many rays can be drawn from a given point?

  • A 2
  • B 5
  • C 8
  • D Infinitely many

Question - 7

What do we call a 169° angle?

  • A An obtuse angle
  • B An acute angle
  • C A right angle
  • D A zero angle

Question - 8

What happens to the measurment of an angle after the extension of its arms?

  • A Doubles
  • B Triples
  • C Remains the same
  • D Cannot be said

Question - 9

In \(\angle ROP\) what is the vertex?

  • A R
  • B P
  • C O
  • D PR

Question - 10

What are the two arms of \(\angle DEF\)?

  • A \(\overset { \longrightarrow }{ ED } \quad and\quad \overset { \longrightarrow }{ EF } \)
  • B \(\overset { \longrightarrow }{ DE } \quad and\quad \overset { \longrightarrow }{ EF } \)
  • C \(\overset { \longrightarrow }{ FE } \quad and\quad \overset { \longrightarrow }{ FD } \)
  • D \(\overset { \longrightarrow }{ DE } \quad and\quad \overset { \longrightarrow }{ FD } \)
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