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Circles Quiz Grade 8

Total questions: 12

Worksheet time: 6mins

Name
Class
Date
1.

If r = 5.8cm, then C = ?

a)

18.212cm

b)

9.16cm

c)

36.4cm

d)

105.63cm

2.

If d = 17.4m, then A = ?

a)

950.7m2

b)

237.7m2

c)

54.6m2

d)

none of these

3.

If C = 94.2cm, then A = ?

a)

706.5cm2

b)

2826cm2

c)

655cm2

d)

30cm2

4.

If A = 530.66cm2, then C = ?

a)

169cm

b)

40.82cm

c)

20.41cm

d)

none of these

5.

A sector has an interior angle of 24 degrees. If the radius is 9cm, then the AREA is approximately...

a)

21.8cm2

b)

254.34cm2

c)

10.6cm2

d)

16.9cm2

6.

A sector has an interior angle of 270 degrees. If the radii that make up the sector are 4cm each, then the PERIMETER OF THE SECTOR is ...

a)

18.84cm

b)

26.84cm

c)

22.84cm

d)

25.12cm

7.

In the diagram, each square is 1 unit. Calculate the AREA inside the green lines.

a)

6.28 units2

b)

12.56 units2

c)

4.71 units2

d)

none of these

8.

What is the AREA of the shaded region?

a)

17.415m2

b)

99.415m2

c)

63.585m2

d)

none of these

9.

A circle has a circumference of 37.68cm. Which of the following is NOT TRUE...

a)

radius > 7cm

b)

diameter = 12cm

c)

area = 113.04cm2

d)

it would take a little more than 3 diameters to wrap around the outside of the circle

10.

1/4 of a circle has an AREA of 254.34cm2. What is the diameter of the circle?

a)

36cm

b)

9cm

c)

18cm

d)

4.5cm

11.

A sector with an interior angle of 24° would contain ...

a)

1/24 of the circumference

b)

24% of the circumference

c)

15% of the circumference

d)

1/15 of the circumference

12.

If r = 3.2cm, then C = ?

a)

10.048 cm

b)

20.096 cm

c)

32.1536 cm

d)

3.14 cm