Circumference Practice

Front

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

Back

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

Front

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

Back

10ft.

Front

What is the relationship between diameter and radius?

Back

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

Front

If the diameter of a circle is 12 inches, what is the radius?

Back

6 inches.

Front

What is the value of π (pi) commonly used in calculations?

Back

Approximately 3.14.

Front

Calculate the circumference of a circle with a radius of 7cm (use 3.14 for pi).

Back

43.96 cm.

Front

What is the diameter of a circle with a circumference of 31.4 cm?

Back

10 cm.

Front

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

Back

10 cm.

Front

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

Back

25.12 inches.

Front

If the radius is 15m, what is the circumference? (Use 3.14 for pi)

Back

94.2 m.