Measuring angles

Worksheet: Measuring angles

Name:Class:

Answer the questions.

1. An angle of 40° is which type of angle?
   a) Acuteb) Obtusec) Reflexd) Right
2. Which type of angle is bigger than 90° but smaller than 180°?
   a) Acuteb) Obtusec) Reflexd) Right
3. A reflex angle is bigger than 180°.
   a) Trueb) False
4. Which angle is reflex?
   a) 120°b) 250°c) 45°d) 90°
5. What tool do we use to measure an angle in degrees?
   a) A calculatorb) A compassc) A protractord) A ruler
6. How many degrees are in a right angle?
   a) 100°b) 180°c) 45°d) 90°
7. Two angles sit on a straight line. One is 70°. What is the other?
   a) 110°b) 20°c) 290°d) 90°
8. Angles on a straight line add up to how many degrees?
9. Angles on a straight line are 130° and 60°, so they fill the line exactly.
   a) Trueb) False
10. Angles around a point add up to how many degrees?
    a) 180°b) 270°c) 360°d) 90°
11. Three angles around a point are 100°, 120° and 90°. What is the fourth angle?
12. Two angles around a point: one is 215°. What is the other?
    a) 135°b) 145°c) 155°d) 215°
13. Which is the best estimate for an angle half the size of a right angle?
    a) 135°b) 20°c) 45°d) 90°
14. An angle that looks a little bigger than a right angle could be about 100°.
    a) Trueb) False
15. The hands of a clock at 3 o'clock make about which angle?
    a) 180°b) 30°c) 60°d) 90°
16. Estimate: an angle is about two right angles together. How many degrees?