Circle Circumference Applications

What is the radius if the circumference of a circle is approximately 18.84 inches?

• 12 inches

• 6 inches

• 3 inches

• 9 inches

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CCSS.7.G.B.4

Why is understanding circumference important in real life?

• It helps in measuring the area of squares.

• It only applies to theoretical math.

• It is used in cooking and construction.

• It has no practical applications.

The radius of a circle is half of the diameter

• TRUE

• FALSE

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CCSS.HSG.C.A.2

How does knowing the circumference help when making a round cake?

• It is not useful.

• It calculates the area of the cake.

• It determines how much frosting is needed.

• It helps in measuring the height.

What is the significance of Pi in geometry?

• Pi is the value of 3.0

• Pi is only relevant in algebra, not geometry

• Pi is significant in geometry because it is the ratio of a circle's circumference to its diameter.

• Pi is used to calculate the area of a square

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CCSS.HSG.GMD.A.1

How is Pi used in real-world applications?

• Pi is used for predicting the weather

• Pi is used in various real-world applications such as calculating the circumference and area of circles, in engineering for structural analysis and design, and in physics for wave and oscillation calculations.

• Pi is used for social media algorithms

• Pi is used for cooking recipes

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CCSS.HSG.GMD.A.1

What is the approximate value of Pi?

• 3.14161

• 3.14158

• 3.14159

• 3.14160

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CCSS.HSG.GMD.A.1

Describe how the circumference and the

diameter of a circle are related.

• The ratio of the circumference to the radius is approximately 3.14 or π

• The ratio of the diameter to π (3.14) is the circumference

• The ratio of the circumference to the diameter is approximately 3.14 or π

• They aren't related, they're just good friends :)

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7.5.B

7.8.B

The circle in the center of a basketball court is being painted. The circle has a

radius of 9 feet. What is the circumference of the circle? Leave your solution in terms of pi.

Circumference = ___π

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7.9.B

The circumference of a circle is 28.26 cm. What is the radius?

r = ___ cm

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7.9.B