Circumference Quiz

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

• 2 * π * r^2

• 3 * π * r

• 2 * π * r

• π * r^2

Tags

CCSS.7.G.B.4

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

• 25 cm

• 10 cm

• 15.7 cm

• 31.4 cm

Tags

CCSS.7.G.B.4

A circle has a diameter of 12 cm. What is its circumference? (Use π=3.14)

• 15.72 cm

• 37.68 cm

• 9.42 cm

• 24.56 cm

Tags

CCSS.7.G.B.4

Find the circumference of a circle with a radius of 8 cm. (Use π=3.14)

• 10.5 cm

• 16.28 cm

• 32.56 cm

• 50.24 cm

Tags

CCSS.7.G.B.4

The circumference of a circle is 31.4 cm. What is its diameter? (Use π=3.14)

• 15 cm

• 20 cm

• 25 cm

• 10 cm

Tags

CCSS.7.G.B.4