Circumference

Front

What is the definition of circumference?

Back

Circumference is the distance around the edge of a circle.

Front

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

Back

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

Front

If a circle has a radius of 10 cm, what is its circumference?

Back

62.83 cm (Circumference = 2 × π × 10).

Front

What is the relationship between diameter and radius?

Back

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

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 20 inches?

Back

62.83 inches (Circumference = π × 20).

Front

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

Back

5 meters (Radius = Circumference / (2 × π)).

Front

What is the circumference of a circle with a radius of 15 feet?

Back

94.25 feet (Circumference = 2 × π × 15).

Front

What is the diameter of a circle with a circumference of 100 cm?

Back

31.83 cm (Diameter = Circumference / π).

Front

If a clock's minute hand has a radius of 12 cm, what is the circumference of the circle it traces?

Back

75.40 cm (Circumference = 2 × π × 12).