Circumference of a Circle

Front

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

Back

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

Front

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

Back

3.14.

Front

If a circle has a diameter of 10 feet, what is its circumference?

Back

31.4 ft.

Front

What is the relationship between diameter and radius?

Back

Radius is half of the diameter.

Front

What is the circumference of a circle with a radius of 7 inches?

Back

43.96 in.

Front

What does circumference measure?

Back

The distance around a circle.

Front

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

Back

20 feet.

Front

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

Back

10 inches.

Front

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

Back

Radius = Circumference / (2 × π).

Front

What is the circumference of a circle with a diameter of 12 feet?

Back

37.68 ft.