10 questions🇬🇧English
⭕ Area & Circumference of Circles – Year 8
Maths · Year 8 (KS3) — practise using π to find the circumference and area of circles, semicircles and quarter circles
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Questions
A circle has a radius of 7 cm. What is its diameter?
49 cm
21 cm
3.5 cm
14 cm
20s
Which formula gives the circumference of a circle with diameter d?
C = πr
C = πr²
C = πd
C = 2πd
20s
A circle has a diameter of 10 cm. What is its circumference, in terms of π?
25π cm
20π cm
10π cm
5π cm
20s
A circle has a radius of 3 cm. What is its area, in terms of π?
36π cm²
3π cm²
9π cm²
6π cm²
30s
A circle has a diameter of 10 cm. What is its area, correct to 1 decimal place?
314.2 cm²
31.4 cm²
157.1 cm²
78.5 cm²
30s
A circle has a radius of 4 cm. What is its circumference, correct to 1 decimal place?
25.2 cm
50.3 cm
25.1 cm
12.6 cm
30s
The circumference of a circle is 12π cm. What is its radius?
24 cm
6 cm
12 cm
3 cm
30s
What is the area of a semicircle with radius 4 cm, in terms of π?
16π cm²
8π cm²
4π cm²
2π cm²
30s
What is the area of a quarter circle with radius 6 cm, correct to 1 decimal place?
28.3 cm²
9.4 cm²
56.5 cm²
113.1 cm²
60s
A circle has a circumference of 50 cm. What is its radius, correct to 1 decimal place?
7.9 cm
15.9 cm
8.0 cm
4.0 cm
60s