Finding the Circumference

Front

What is the distance around a circle?

Back

Circumference

Front

The diameter of a circle is 3 centimeters. What is the circumference?

Back

9.42 cm

Front

What does d represent in the formula C = π·d?

Back

diameter

Front

What number represents π?

Back

3.14

Front

Find the circumference of the circle with a diameter of 10 cm.

Back

31.4 cm

Front

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

Back

C = π·d or C = 2·π·r

Front

If the radius of a circle is 5 cm, what is the circumference?

Back

31.4 cm

Front

What is the relationship between diameter and radius?

Back

Diameter is twice the radius (d = 2·r).

Front

If the circumference of a circle is 62.8 cm, what is the diameter?

Back

20 cm

Front

What is the value of π (pi) approximately?

Back

3.14