Circumference of a Circle

What is a Circumference?

• A chord that passes through the center of the circle

• A rubber band

• The distance around the circle

• A special number

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CCSS.HSG.C.B.5

CCSS.HSG.GMD.A.1

What is the value of Pi?

• 3.41

• 3.14

• 31.4

• 34.1

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CCSS.HSG.GMD.A.1

A ten centavo coin has a diameter of 2 centimeters. What is its circumference ?

• 6.82 centimeters

• 3.14 centimeters

• 3.41 centimeters

• 6.28 centimeters

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CCSS.7.G.B.4

Solve:

3.14 x 10 =

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CCSS.5.NBT.A.2

If a tin can has a radius of 12 inches, what is its diameter?

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CCSS.7.G.B.4

A drum of water has a diameter of 64 inches, what is its radius?

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CCSS.7.G.B.4

Substitute the given data to the formula.

Given: Radius = 5 yards

Formula: C = 2πr

• C = 5 x 2 x 31.4

• C = 2 x 3.14 x 5

• C = 2 x 5 x 3.41

• C = 5 x 2 x 3.45

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CCSS.7.G.B.4

Find the circumference:

Diameter = 14 feet

• 43.28 feet

• 43.97 feet

• 43.98 feet

• 43.96 feet

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CCSS.7.G.B.4

Find the circumference:

Radius = 8 yards

• 50.23 yards

• 50.24 yards

• 50.25 yards

• 50.26 yards

Tags

CCSS.7.G.B.4

Find the circumference:

Diameter = 4 yards

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CCSS.7.G.B.4