Quiz about Circles & Polygons 2025

Question 1

$$C\ =\ \pi d\ or\ C\ =\ 2\pi r$$

What is the circumference of this circle ?

Accepted Answer

37.68 cm

Answer

3.14 cm

Answer

24 cm

Answer

68.4 cm

Question 2

$$C\ =\ \pi d\ or\ C\ =\ 2\pi r$$

What is the circumference of this circle? (Round to the nearest whole number)

Accepted Answer

88 in

Answer

44 in

Answer

116 in

Answer

80 inches

Question 3

$$A\ =\ \pi r^2$$

What is the area of this circle?

Accepted Answer

113.1 cm

Answer

163.2 cm2

Answer

15.3 cm2

Answer

124.2 cm2

Question 4

What is the perimeter of the rectangle?

Accepted Answer

28 feet

Answer

14 feet

Answer

48 feet

Question 5

What is the area of the composite figure?

Accepted Answer

48 cm2

Answer

90 cm2

Answer

78 cm2

Answer

12 cm2

Question 6

What is the area of the shaded region?

Accepted Answer

12 cm2

Answer

4 cm2

Answer

16 cm2

Answer

8 cm2

Question 7

Find the area of the parallelogram above

(use formula sheet)

Accepted Answer

52 ft2

Answer

14.5 ft2

Answer

48.5 ft2

Answer

7.3 ft2

Question 8

Find the area

(use formula sheet)

Accepted Answer

44 yd2

Answer

41 yd

Answer

45 yd2

Answer

43 yd

Question 9

What is the area of the figure?

(use formula sheet if necessary)

Accepted Answer

$$275\ cm^2$$

Answer

$$75\ cm^2$$

Answer

$$125\ cm^2$$

Answer

$$200\ cm^2$$

Question 10

Find the area of the composite figure.

(use formula sheet if necessary)

Accepted Answer

60 ft2

Answer

31 ft2

Answer

40 ft2

Answer

80 ft2

Question 11

If the circumference of a circle is 16 $$\pi$$ , find the diameter of the circle.

$$C\ =\ \pi d\ or\ C\ =\ 2\pi r$$

Accepted Answer

16

Answer

4

Answer

8

Answer

32

Question 12

If the circumference of a circle is 20 $$\pi$$ , find the area of the circle in terms of $$\pi$$ .

(Hint: first work backwards to find the radius of the circle) $$C\ =\ \pi d\ or\ C\ =\ 2\pi r,\ \ A=\pi r^2$$

Accepted Answer

$$100\pi$$

Answer

$$400\pi$$

Answer

$$10\pi$$

Answer

$$20\pi$$

Question 13

Find the area of the figure:

(use formula sheet if necessary)

Accepted Answer

30 ft2

Answer

60 ft2

Answer

16 ft2

Answer

36 ft2

Question 14

If the area of a triangle is 36 square inches and the base is 9 in., what is the height of the triangle?

(Use formula sheet if necessary)

Accepted Answer

8 inches

Answer

72 inches

Answer

4 inches

Answer

18 inches

Question 15

The area of a rectangle is 63 sq. inches. One side length is 7 inches. What is the other side length?

Accepted Answer

9 in.

Answer

7 in.

Answer

6 in.

Answer

10 in.

Question 16

Find the Area of the Shaded Region in this figure.

$$C\ =\ \pi d\ or\ C\ =\ 2\pi r$$

Accepted Answer

13.76 sq. ft.

Answer

136.96 sq. ft.

Answer

60.86 sq. ft.

Answer

739.84 sq. ft.

Question 17

Find the area of the semicircle. Round your answer to the nearest whole number.

$$A=\pi r^2$$

Accepted Answer

77

Answer

19

Answer

154

Answer

22

Circles & Polygons 2025

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