# Measuring angles

> Grade 5: acute, obtuse and reflex angles, angles in degrees, angles on a straight line = 180 degrees, angles around a point = 360 degrees, estimate an angle.

Source: https://olyclass.com/library/math-g5-angles-measure-en/

- Subject: Math
- Level: Grade 5
- Practice: 16
- Play it free on one screen (projector, TV or whiteboard): https://olyclass.com/library?play=math-g5-angles-measure-en
- Copy and edit it: https://olyclass.com/library?copy=math-g5-angles-measure-en
- Games it plays well in: [Tile Grab](https://olyclass.com/classroom-games/tile-grab/), [Dare Board](https://olyclass.com/classroom-games/dare-board/), [Prize Climb](https://olyclass.com/classroom-games/prize-climb/), [Ring the Bell](https://olyclass.com/classroom-games/ring-the-bell/)

## Questions

1. An angle of 40° is which type of angle? (Acute / Obtuse / Reflex / Right)
   Answer: Acute
2. Which type of angle is bigger than 90° but smaller than 180°? (Acute / Obtuse / Reflex / Right)
   Answer: Obtuse
3. A reflex angle is bigger than 180°.
   Answer: True
4. Which angle is reflex? (120° / 250° / 45° / 90°)
   Answer: 250°
5. What tool do we use to measure an angle in degrees? (A calculator / A compass / A protractor / A ruler)
   Answer: A protractor
6. How many degrees are in a right angle? (100° / 180° / 45° / 90°)
   Answer: 90°
7. Two angles sit on a straight line. One is 70°. What is the other? (110° / 20° / 290° / 90°)
   Answer: 110°
8. Angles on a straight line add up to how many degrees?
   Answer: 180°
9. Angles on a straight line are 130° and 60°, so they fill the line exactly.
   Answer: False
10. Angles around a point add up to how many degrees? (180° / 270° / 360° / 90°)
   Answer: 360°
11. Three angles around a point are 100°, 120° and 90°. What is the fourth angle?
   Answer: 50°
12. Two angles around a point: one is 215°. What is the other? (135° / 145° / 155° / 215°)
   Answer: 145°
13. Which is the best estimate for an angle half the size of a right angle? (135° / 20° / 45° / 90°)
   Answer: 45°
14. An angle that looks a little bigger than a right angle could be about 100°.
   Answer: True
15. The hands of a clock at 3 o'clock make about which angle? (180° / 30° / 60° / 90°)
   Answer: 90°
16. Estimate: an angle is about two right angles together. How many degrees?
   Answer: About 180°