Circles - BBC Math

Circles

You scored 9 out of 9

1. In questions 1-4, choose a word from the list which describes the part of the circle that's been highlighted.

You said: Sector

Well done, you remembered that the sector is the area between two radiuses.

2. 

You said: Arc

Well done, you remembered that part of the circumference is called an arc.

3.  

You said: Chord

Well done, you remembered the correct word.

4.  

You said: Segment

Well done, you remembered that a segment is the area between a chord and an arc.

5. In questions 5-7, find the circumference and area of the circle correct to 3 s.f.

Circumference = 

You said: 18.8cm

Well done, you used the correct formula.

6. Area = 

You said: 28.3cm²

Well done, you remembered to square the radius and multiply by π

7. 

Circumference = 

You said: 31.4cm

Well done, you used the correct formula.

8. Area = 

You said: 78.5cm²

Well done, you remembered to square the radius and multiply by π

9. 

Circumference = 

You said: 25.1cm

Well done, you noticed that the diameter was 8cm.