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Circumference of a Circle. By the end of today, you will know about circumference of a circle and pi. Circumference. The circumference of a circle is found by using the formula C = 2 π r. Example 1. Find the circumference of a circle whose diameter is 15 cm. Leave pi in your answer. - PowerPoint PPT Presentation

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Arc Lengths

By the end of today, you will know about circumference of a circle and pi. Circumference of a Circle1CircumferenceThe circumference of a circle is found by using the formula C = 2r

2Example 1Find the circumference of a circle whose diameter is 15 cm. Leave pi in your answerExample 2Find the circumference of a circle with a radius of 22 inches.

Example 3If a circle has a circumference of 18 , what is the radius of the circle?

Practice Problems


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I can find the circumference of a circle