Circumference of a Circle

Practice Questions

Pre-Algebra › Circumference of a Circle

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1

What is the circumference of a circle with an area equal to $81\pi$ ?

2

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

3

Becky's house is surrounded by a circular lake that Becky runs around each day. If Becky wants to figure out the distance she runs around the lake, what formula should Becky use?

4

Find the circumference of the circle with a diameter of $2\pi$ .

5

Determine the circumference of the circle if the radius is $2\pi$ .

6

Find the circumference of a circle with an area of 5.

7

If $\pi = 3.14$ find the circumference of a circle with a diameter of 10 inches.

8

A circle has a radius of . What is its circumference?

9

The perimeter of a given rectangle is equal to the circumference of a given circle. The circle has radius inches; the width of the rectangle is $8 \pi$ inches. What is the length of the rectangle?

10

What is the distance around a silo, if the distance from the center of the silo to the outside is ?

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