Circumference of a Circle

Front

What is the formula for the circumference of a circle?

Back

Circumference = 2 × π × radius

Front

If the radius of a circle is 5 cm, what is the circumference? (Use π = 3.14)

Back

31.4 cm

Front

What is the relationship between diameter and radius?

Back

Diameter = 2 × radius

Front

What is the value of π (pi) approximately?

Back

3.14

Front

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

Back

5 cm

Front

What is the circumference of a circle with a radius of 3 cm? (Use π = 3.14)

Back

18.84 cm

Front

What is the circumference of a half circle with a radius of 4 cm? (Use π = 3.14)

Back

12.56 cm

Front

What is the distance around a circle called?

Back

Circumference

Front

If the circumference of a circle is 31.4 cm, what is the radius? (Use π = 3.14)

Back

5 cm

Front

What is the diameter of a circle with a circumference of 31.4 cm? (Use π = 3.14)

Back

10 cm