Free Printable Year 8 Circles Quizizz

1.

What is the diameter of the circle?

a)

3

b)

6

c)

9

d)

12

2.

What is the radius of the circle?

a)

2cm

b)

5cm

c)

10cm

d)

20cm

3.

Which equation would you use to find circumference?

a)

πr²

b)

πd

c)

2r

d)

½d

4.

What is the circumference of the circle? Round to the nearest centimeter.

a)

16 cm²

b)

61 cm²

c)

16 ft²

d)

61 ft²

5.

What is the area of the circle rounded to the nearest tenth?

a)

28.3 meters squared

b)

28 meters squared

c)

29 meters squared

d)

Answer Not Here

6.

What is the area of the circle rounded to the nearest tenth?

a)

80 cm squared

b)

79 cm squared

c)

78.5 cm squared

d)

78 cm squared

7.

what is the area of this semicircle with a diameter of 8 cm? Give answer in terms of π.

4 lines

8.

What is the area of the shaded region? Round to the nearest hundredth.

a)

1.26

b)

452.39

c)

9.42

d)

113.10

9.

Find the area of the shaded sector of circle O. The radius is 6 inches and the central angle is 100°. Express answer as an exact value

a)

5π/3

b)

10π/3

c)

10π

d)

40π

10.

What is the area of the shaded region?

a)

50.24 units²

b)

3,015.93 units²

c)

8.37 units²

d)

7.19 units²

11.

What is the area of the shaded sector? Round your answer to the nearest hundredth. Use 3.14 for π

a)

9.64

b)

163.85

c)

743.61

d)

43.74

12.

Find the area of the shaded sector. Leave answer in terms of $\pi$

a)

$5\ \pi\ cm^2$

b)

$3\ \pi\ cm^2$

c)

$24\ \pi\ cm^2$

d)

$40\ \pi\ cm^2$

13.

Given the measurements in the diagram, find the total area of the shaded regions.

a)

10.47 cm²

b)

52.36 cm²

c)

26.18 cm²

d)

5.24 cm²

14.

A cathedral window is built in the shape of a semicircle. If the window is to contain three stained glass sections of EQUAL SIZE, what is the area of one section of the semicircle? Round to the nearest tenth.

a)

3.3 ft²

b)

4.5 ft²

c)

6.3 ft²

d)

7.1 ft²

15.

If Pacman's mouth, when open, is 60° and the radius of his mouth is 12mm, what is the EXACT area of the rest of his body? Give answer in terms of π

4 lines

16.

Does this picture show the diameter or radius of a circle?

a)

Diameter

b)

Radius

17.

is the formula for?

\pi r^2\ \times\left(\frac{\theta\degree}{360\degree}\right)

a)

arc length

b)

area of a sector

c)

area of a segment

d)

arc measure

18.

Calculate the length of the arc. Round to 2 decimal places.

a)

346.36 mm

b)

33.0 mm

c)

32.99 mm

d)

346.4 mm

19.

What is the distance around the semicircle? (Use 3.14 = π and round to the nearest tenths place)

a)

18.5

b)

11.3

c)

20.3

d)

22.6

20.

Diameter = _______ x Radius

a)

Circumference

b)

c)

2

d)

Eleventy Seven

21.

Which of the following shows the correct working out when finding the ARC LENGTH of the sector shown in the diagram?

a)

$\frac{45}{360}\times\left(2\times12\right)$

b)

$\frac{45}{360}\times\left(2\times\pi\times12\right)$

c)

$45\times2\times\pi\times12$

d)

$\frac{360}{45}\times\left(2\times\pi\times12\right)$

22.

Work out the perimeter of the sector in $m$ .

Give your answer correct to 1 decimal place.

You do not need to type the units.

(a)

23.

Name the circle part shown

a)

Diameter

b)

Chord

c)

Radius

d)

Tangent

24.

Name the circle part shown in green

a)

Sector

b)

Arc

c)

Segment

d)

Radius

25.

Calculate the perimeter of the shape. Round to 2 decimal places.

a)

53.38 m

b)

30.69 m

c)

45.38 m

d)

22.69 m

Year 8 Circles Quizizz

Total questions: 25

Worksheet time: 2hrs 5mins

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