Circumference and Area of Circle Formulas

Choose the answer which best describes how these formulas are related to each other.

• They both solve for circumference. In the first formula it uses diameter, in the second formula it uses two times the radius, which is the same thing as diameter.

• They both solve for circumference, in the first uses diameter and the second uses pi.

• They both solve for area. In the first formula it uses diameter, in the second formula it uses two times the radius, which is the same thing as diameter.

• They both use circumference to solve for pi. One uses radius, the other uses diameter.

Tags

CCSS.7.G.B.4

Find Circumference. Watch the units.

• 37.68 m²

• 37.68 m

• 18.84 m

• 18.84 m²

Tags

CCSS.7.G.B.4

Find Circumference.

• 87.92 cm

• 43.96 cm

• 21.98 cm

• 3.14 cm

Tags

CCSS.7.G.B.4

What is the approximate numerical value of this sign?

• 3.11

• 3.14

• 4.13

• 6.28

Tags

CCSS.HSG.GMD.A.1

What is the distance around a circle called?

• the radius

• the diameter

• the circumference

Find the area of the circle.

• 176.6 cm²

• 706.5 cm²

• 23.6 cm²

• 50.24 cm²

Tags

CCSS.7.G.B.4

Find the circumference of the circle.

• 4.082 m

• 8.164 m

• 1.32665 m

• 5.3066 m

Tags

CCSS.7.G.B.4

Find the circumference, rounding your answer to 1 decimal place.

• 34.9mm

• 31.4mm

• 34.5mm

• 17.3mm

Tags

CCSS.7.G.B.4

Which formulas can be used to find the circumference of a circle?

• C = π r²

• C = 2π r

• C = π d

• C = 2πd

Tags

CCSS.7.G.B.4

What is the area of a circle?

• halfway through a circle

• a line through the center of a circle

• the amount of space inside of the circle

• the distance around a circle