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English 17 Public

Circle

Study Slideshow

How do you find the radius if you have the diameter?

Diameter divide by 2

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How to do you find the diameter if you have the radius?

2 times radius

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Diameter = 10, Radius = ?

5

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Radius = 7, Diameter = ?

14

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What the value of Pi?

3.14

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What is the measure all the way around a circle?

Circumference

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What is another word for circumference?

Perimeter

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How do you find the circumfernce of a circle?

C = Pi x d

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What is circumference of a wheel with a 7 cm radius?

44 cm

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What is circumference of a circle with a 2 cm diameter?

6.28 cm

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What is the circumference of a donut with a 21 cm radius?

132 cm

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What is the radius?

5 cm

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How do you find the area of circle?

A = Pi times the radius squared

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10 cm radius, find the area.

314 square cm.

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14 cm radius, find the area.

616 sqaure cm.

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7 cm diameter, find the area.

154 square cm.

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