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Circles: Area and Circumference Practice

Authored by Wayground Content

Mathematics

8th Grade

Used 6+ times

Circles: Area and Circumference Practice
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15 questions

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1.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

What is the relationship between diameter and radius?

The diameter is equal to the radius.

The diameter is half of the radius.

The diameter (d) of a circle is twice the radius: d = 2r.

The diameter is the same as the circumference.

2.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

What is the formula for the area of a circle?

A = πr²

A = 2πr

A = πd

A = r²

3.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

What is the formula for the circumference of a circle?

C = πd

C = 2πr

C = r^2π

C = 2r

4.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

If a circular track has a circumference of 157 meters, what is the radius?

20 m

25 m

30 m

35 m

5.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

If a circular garden has a radius of 3 m, what is its circumference?

12.56 m

18.84 m

9.42 m

25.13 m

6.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

What is the circumference of a circle with a radius of 10 cm?

50.24 cm

62.8 cm

31.4 cm

78.5 cm

7.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

How do you find the radius from the circumference?

r = C / (2π)

r = C / π

r = 2C / π

r = πC

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