Question 1

Find the circumference of the following circle, correct to 3 significant figures.

Accepted Answer

50.3 cm

Answer

12.6 cm

Answer

25.1 cm

Answer

201 cm

Question 2

In the figure, the area of the circle is $324\pi cm^2$ .Find its radius.

Accepted Answer

18 cm

Answer

17 cm

Answer

16 cm

Answer

19 cm

Question 3

In the figure, the diameter of the semi-circle is 1 cm. Find the area of the semi-circle.

Accepted Answer

$\frac{\pi}{8}cm^2$

Answer

$\frac{\pi}{8}cm^2$

Answer

$\frac{\pi}{8}cm^2$

Answer

$\frac{\pi}{8}cm^2$

Question 4

In the figure, a circle is divided intofour equal parts. If the area of each part is $324\pi cm^2$ , find the radius of the circle.

Accepted Answer

6 cm

Answer

18 cm

Answer

12 cm

Answer

3 cm

Question 5

Which ofthe following circles has the longest radius?

Accepted Answer

a circle with diameter 3 cm

Answer

a circle with radius 1 cm

Answer

a circle with circumference 4 cm

Answer

a circle with area 5 cm²

Related quizzes