Circumference and Area of Circle | Baamboozle - Baamboozle

English 21 Public

Finding the circumference and area of a circle.

Study Slideshow

What's the formula for finding the circumference of a circle?

Multiply 3.14 times the diameter of the circle

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What is the formula for finding the area of a circle?

Pi (3.14) times radius times radius

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What is the radius of a circle when the diameter is 18 inches?

9 inches

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What is the diameter of a circle?

It's a line that goes from one edge of a circle through the center of a circle touching the opposite edge.

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Where is the circumference of a circle?

The circumference of a circle is the distance around the circle.

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The diameter of a circle is 7.5 miles. What is the unit of measurement when you find the area of the circle?

square miles or miles^2. (^2 means "to the power of 2.")

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The radius of a circle is 130 meters. What is the unit of measurement used for the circumference of this circle?

meters

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What is the approximate value often used for pi?

3.14

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Find the circumference of a circle with a diameter of 12 inches.

37.68 inches

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What's the area of a circle with a radius of 5 miles?

78.5 square miles (78.5 mi^2)

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What is the diameter of this circle?

64 centimeters

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What is the area of this circle?

3215.36 square centimeters or 3215.36 cm^2

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The diameter of the window is 5 feet. What is its area?

19.625 square feet (19.625 ft^2)

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The Jeep spare tire cover has a radius of 16 inches. What is the circumference of the cover?

100.48 inches or approximately 8 feet

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The commemorative 1988 plate celebrating Mickey Mouse's 60th birthday is 9 inches in diameter. What is the area of the plate?

63.585 square inches (63.585 in^2)

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The commemorative 1988 plate celebrating Mickey Mouse's 60th birthday is 9 inches in diameter. What is the CIRCUMFERENCE of the plate?

28.26 inches

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