Circumference of a Circle

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

• 2 * π * radius

• 2 * radius

• radius * radius

• π * radius

Tags

CCSS.7.G.B.4

If the radius of a circle is 5 cm, what is its circumference?

• 15π cm

• 20π cm

• 25π cm

• 10π cm

Tags

CCSS.7.G.B.4

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

• C = 2 * π * d

• C = π * r

• C = 2 * d

• C = π * d

Tags

CCSS.7.G.B.4

If the diameter of a circle is 12 cm, what is its circumference?

• 18 cm

• 24 cm

• 30 cm

• 37.7 cm

Tags

CCSS.7.G.B.4

If the radius of a circle is 8 cm, what is its circumference?

• 25.12 cm

• 50.24 cm

• 40.48 cm

• 16.32 cm

Tags

CCSS.7.G.B.4

If the diameter of a circle is 18 cm, what is its circumference?

• 56.5487 cm

• 36.5487 cm

• 64.5487 cm

• 45.5487 cm

Tags

CCSS.7.G.B.4

If the radius of a circle is 3.5 cm, what is its circumference?

• 10π cm

• 14π cm

• 7π cm

• 21π cm

Tags

CCSS.7.G.B.4

If the diameter of a circle is 10.5 cm, what is its circumference?

• 35.2 cm

• 28.7 cm

• 31.5 cm

• 32.97 cm

Tags

CCSS.7.G.B.4

If the radius of a circle is 6.2 cm, what is its circumference?

• 37.2 cm

• 18.6π cm

• 31.4 cm

• 12.4π cm

Tags

CCSS.7.G.B.4

If the diameter of a circle is 15.8 cm, what is its circumference?

• 31.6 cm

• 63.2 cm

• 79.3 cm

• 49.64 cm

Tags

CCSS.7.G.B.4