Front

What is the formula for finding the circumference of a circle?

Back

C = π·d

Front

Find the circumference of a circle with a diameter of 7 cm.

Back

21.98 cm

Front

Find the circumference of a circle with a diameter of 5 cm.

Back

15.7 cm

Front

What is the diameter of a circle?

Back

A line through the center of a circle.

Front

Find the circumference of a circle with a diameter of 12 cm.

Back

37.7 cm

Front

What does the term 'circumference' mean?

Back

The distance around a circle.

Front

If the radius of a circle is 3 cm, what is the circumference?

Back

C = 2πr = 6π ≈ 18.84 cm

Front

What is the relationship between diameter and radius?

Back

Diameter is twice the radius (d = 2r).

Front

How do you calculate the circumference using radius?

Back

C = 2πr.

Front

What is π (pi)?

Back

A mathematical constant approximately equal to 3.14.