Circumference of a Circle

Front

What is the formula for the circumference of a circle?

Back

Circumference = π × diameter

Front

If the diameter of a circle is 10 cm, what is the circumference?

Back

31.40 cm

Front

What is the relationship between radius and diameter?

Back

Diameter = 2 × radius

Front

What is the circumference of a circle with a radius of 12.5 mm?

Back

78.5 mm

Front

What does the term 'circumference' refer to?

Back

The measurement around the circle.

Front

If a circle has a circumference of 18.84 cm, what is its diameter?

Back

Diameter = Circumference / π = 6 cm (approximately)

Front

What is the circumference of a pizza with a 10-inch diameter?

Back

31.40 inches

Front

How do you calculate the circumference if you only know the radius?

Back

Circumference = 2 × π × radius

Front

What is the diameter of a circle?

Back

The distance from an edge of a circle to another edge through the center.

Front

If the circumference of a circle is 37.68 cm, what is the radius?

Back

Radius = Circumference / (2 × π) = 6 cm (approximately)