Question 1

If the radius of a circle is 4 cm, what is the diameter of the circle?

Accepted Answer

8 cm

Answer

12 cm

Answer

2 cm

Answer

16 cm

Question 2

If the diameter of a circle is 14 cm, what is the radius?

Accepted Answer

7 cm

Answer

21 cm

Answer

28 cm

Answer

10 cm

Question 3

What is the formula to calculate the circumference of a circle if the radius is given?

Accepted Answer

Answer

Answer

Answer

Question 4

If the diameter of a circle is 10 cm, what is the radius?

Accepted Answer

5 cm

Answer

10 cm

Answer

20 cm

Answer

2.5 cm

Question 5

If a circle has a diameter of 14 cm, what is its circumference?

Accepted Answer

Answer

Answer

Answer

Question 6

What is the area of a circle with a diameter of 10 cm?

Accepted Answer

2 \pi r

square cm

Answer

2 \pi r

square cm

Answer

2 \pi r

square cm

Answer

2 \pi r

square cm

Question 7

A circle has a diameter of 12 cm. What is the radius?

Accepted Answer

6 cm

Answer

24 cm

Answer

12 cm

Answer

3 cm

Question 8

What is the diameter of a circle with a radius of 8 cm?

Accepted Answer

16 cm

Answer

24 cm

Answer

8 cm

Answer

4 cm

Question 9

What is the area of a circle with a radius of 7 inches? (Use π ≈ 3.14)

Accepted Answer

2 \pi r

square inches

Answer

2 \pi r

square inches

Answer

2 \pi r

square inches

Answer

2 \pi r

square inches

Question 10

If a circle has a radius of 3 cm, what is the circumference? (Use π ≈ 3.14)

Accepted Answer

<math>18.84</math> cm

Answer

<math>28.26</math> cm

Answer

<math>12.56</math> cm

Answer

<math>9.42</math> cm

Question 11

If the diameter of a circle is 12 inches, what is its radius?

Accepted Answer

6 inches

Answer

24 inches

Answer

3 inches

Answer

12 inches

Question 12

What is the area of a circle with a diameter of 14 cm? (Use π ≈ 3.14)

Accepted Answer

2 \pi r

square cm

Answer

2 \pi r

square cm

Answer

2 \pi r

square cm

Answer

2 \pi r

square cm

Question 13

What is the area of a circle with a radius of 7 cm? Use

\pi \approx 3.14

.

Accepted Answer

153.86 square cm

Answer

156.24 square cm

Answer

49 square cm

Answer

98 square cm

Question 14

What is the circumference of a circle with a diameter of 10 cm? Use

\pi \approx 3.14

.

Accepted Answer

31.4 cm

Answer

28.3 cm

Answer

20 cm

Answer

15.7 cm

Question 15

If the radius of a circle is 3 cm, what is its circumference? Use

\pi \approx 3.14

.

Accepted Answer

18.84 cm

Answer

12 cm

Answer

9.42 cm

Answer

28.26 cm

Question 16

If the radius of a circle is 7 cm, what is its diameter?

Accepted Answer

14 cm

Answer

21 cm

Answer

7 cm

Answer

49 cm

Question 17

What is the formula to calculate the area of a circle?

Accepted Answer

Answer

Answer

Answer

Question 18

What is the relationship between the diameter and radius of a circle?

Accepted Answer

The diameter is twice the radius

Answer

The diameter is half the radius

Answer

The diameter is the square of the radius

Answer

The diameter is the same as the radius

Question 19

If the radius of a circle is 10 cm, what is its circumference? (Use

\pi \approx 3.14

)

Accepted Answer

62.8 cm

Answer

31.4 cm

Answer

20 cm

Answer

78.5 cm

Question 20

If the diameter of a circle is 12 cm, what is its area? (Use

\pi \approx 3.14

)

Accepted Answer

113.04 square cm

Answer

75.36 square cm

Answer

452.16 square cm

Answer

37.68 square cm

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