Circumference of Circles

Front

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

Back

Circumference = π × diameter or Circumference = 2 × π × radius.

Front

If the diameter of a circle is 65 m, what is the circumference?

Back

204.1 m

Front

What is the radius of a circle if the diameter is 19 inches?

Back

9.5 inches

Front

What is the circumference of a circle?

Back

The distance around a circle.

Front

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

Back

20 ft

Front

What is the value of π (pi) approximately?

Back

3.14

Front

If the circumference of a circle is 63.56 cm, what is the radius?

Back

10.14 cm

Front

What is the relationship between diameter and radius?

Back

Diameter = 2 × radius.

Front

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

Back

31.4 cm

Front

What does the term 'circumference' refer to?

Back

The total distance around the circle.