# Circles, angles and nets

> Grade 6: radius, diameter and circumference, diameter = 2 x radius, angles in a triangle add to 180 degrees, angles in a quadrilateral add to 360 degrees, nets of cubes and prisms.

Source: https://olyclass.com/library/math-g6-circles-nets-en/

- Subject: Math
- Level: Grade 6
- Practice: 16
- Play it free on one screen (projector, TV or whiteboard): https://olyclass.com/library?play=math-g6-circles-nets-en
- Copy and edit it: https://olyclass.com/library?copy=math-g6-circles-nets-en
- Games it plays well in: [High Water](https://olyclass.com/classroom-games/high-water/), [Tug of War](https://olyclass.com/classroom-games/tug-of-war/), [Lucky Wheel](https://olyclass.com/classroom-games/lucky-wheel/), [Bowling](https://olyclass.com/classroom-games/bowling/)

## Questions

1. What do we call the distance all the way around a circle? (Area / Circumference / Diameter / Radius)
   Answer: Circumference
2. What is the name of a straight line from the centre of a circle to its edge? (Arc / Circumference / Diameter / Radius)
   Answer: Radius
3. The diameter of a circle passes through its centre.
   Answer: True
4. A circle has a radius of 7 cm. What is its diameter? (14 cm / 21 cm / 3.5 cm / 49 cm)
   Answer: 14 cm
5. A circle has a diameter of 18 m. What is its radius in metres?
   Answer: 9 m
6. Two angles in a triangle are 60° and 80°. What is the third angle? (140° / 30° / 40° / 50°)
   Answer: 40°
7. A triangle can have angles of 90°, 60° and 40°.
   Answer: False
8. A triangle has two equal angles of 45°. What is its third angle?
   Answer: 90°
9. What do the four angles in any quadrilateral add up to? (180° / 270° / 360° / 90°)
   Answer: 360°
10. A quadrilateral has angles 90°, 120° and 70°. What is the fourth angle? (100° / 280° / 60° / 80°)
   Answer: 80°
11. A rectangle has four equal angles. How many degrees is each one?
   Answer: 90°
12. Three angles of a quadrilateral are 110°, 85° and 75°. What is the fourth? (100° / 270° / 80° / 90°)
   Answer: 90°
13. How many square faces does the net of a cube have? (4 / 5 / 6 / 8)
   Answer: 6
14. Which solid can be made by folding a net of 2 triangles and 3 rectangles? (Cube / Cuboid / Square pyramid / Triangular prism)
   Answer: Triangular prism
15. A net of a cuboid can have 6 rectangles.
   Answer: True
16. Diameter 10 cm, circumference about 31 cm. Circumference ÷ diameter is about…? (About 10 / About 2 / About 3 / About 5)
   Answer: About 3