Unit #10, Lesson #2 - Circumference of a Circle

Which of the following can be used to find the circumference of a circle? (Check all that apply.)

• C = πr²

• C = πd

• C = 2πr

• C = 2πd²

Tags

CCSS.7.G.B.4

What is the circumference of a circle whose diameter is 18 cm? (Check all that apply.)

• 18π

• 113.1

• 9π

• 56.5

Tags

CCSS.7.G.B.4

The radius of a circle is 4.5 cm. What is the best approximation of its circumference?

• 28.3 cm.

• 7.1 cm.

• 14.1 cm.

• 56.5 cm.

Tags

CCSS.7.G.B.4

What is the circumference of a circle whose diameter is 2.25 cm? Round your answer to the nearest tenth of a cm. (Don't input a label.)

Tags

CCSS.7.G.B.4

What is the circumference of a circle whose radius is 8.7 cm. Round your answer to the nearest hundredth. (Don't insert a label.)

Tags

CCSS.7.G.B.4

A circle has a circumference of 37.7 cm. What is the length of its diameter?

• 12

• 6

• 24

• 18

Tags

CCSS.7.G.B.4

A circle has a circumference of 70.37 cm. What is the length of its radius?

• 22.4

• 44.8

• 11.2

• 20.6

Tags

CCSS.7.G.B.4

If the length of arc AC is 5π cm, then what is the length of radius AB?

• 15

• 120

• 30

• 7.5

Tags

CCSS.HSG.C.B.5

If radius PQ is 9.2 cm, what is the length of arc QR?

• 9.6 cm.

• 57.8 cm.

• 19.2 cm.

• 4.8 cm.

Tags

CCSS.HSG.C.B.5

What is the total perimeter of this shape? Round your answer to the nearest tenth. (Don't insert a label.)

Tags

CCSS.HSG.C.B.5