Circumference

Front

What does 'circumference' mean?

Back

Distance around a circle.

Front

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

Back

Circumference = π × diameter.

Front

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

Back

31.4 cm.

Front

What is the relationship between diameter and radius?

Back

Diameter = 2 × radius.

Front

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

Back

20 cm.

Front

What is π (pi) approximately equal to?

Back

3.14.

Front

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

Back

Diameter = Circumference / π.

Front

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

Back

43.96 cm.

Front

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

Back

10 cm.

Front

Does this picture show the diameter or radius of a circle?

Back

Diameter.