Circumference of a Circle

Front

What is the radius of a circle if the diameter is 16.6 in?

Back

8.3 in

Front

What is the formula for the circumference of a circle?

Back

The circumference of a circle is equal to pi times the diameter.

Front

How do you calculate the circumference of a circle?

Back

You multiply the diameter by 3.14.

Front

What is the term for the longest distance across a circle through its center?

Back

Diameter

Front

What is the term for the distance from the center of a circle to any point on its edge?

Back

Radius

Front

How can you find the diameter if you are given the radius?

Back

Multiply the radius by 2.

Front

What is the value of pi (π) approximately?

Back

3.14

Front

If the radius of a circle is 5 in, what is the diameter?

Back

10 in

Front

What is the relationship between diameter and radius?

Back

The diameter is twice the radius.

Front

What is the circumference of a circle with a diameter of 10 in?

Back

31.4 in (using C = πd, C = 3.14 * 10).