Circumference

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 10 inches, what is the radius?

Back

5 inches.

Front

What is the relationship between diameter and radius?

Back

The diameter is twice the radius (Diameter = 2 × Radius).

Front

How do you find the diameter if you know the circumference?

Back

Diameter = Circumference / π.

Front

What is the value of π (pi) approximately?

Back

3.14.

Front

If a circle has a radius of 7 cm, what is its diameter?

Back

14 cm.

Front

What is the circumference of a circle with a radius of 3 m?

Back

18.84 m.

Front

If the circumference of a circle is 31.4 cm, what is the radius?

Back

5 cm.

Front

What is the circumference of a circle with a diameter of 8 ft?

Back

25.12 ft.

Front

If a circular track has a radius of 15 m, how far do you run in one complete lap?

Back

94.25 m.