Explanation Formula used: Area of a circle : Area of a circle is given by the formula A = π r 2 , where r is the radius of the circle. Circumference of a circle : Circumference of a circle is given by the formula C = π d o r C = 2 π r , where d is the diameter and r is the radius of the circle. Calculation: It is given that the circumference of the circle is 73.6 in. That is, by the definition, C = 2 π r = 73.6 i n . Use π key on the calculator and obtain the radius of the circle from the circumference as follows. 2 π r = 73.6 i n . r = 73.6 i n

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ISBN: 8220100803055

Author: SAUNDERS

Publisher: PEARSON

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Chapter 8.4, Problem 9BE

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The area of a circle whose circumference is 73.6 in.

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Chapter 8.4, Problem 8BE

Chapter 8.4, Problem 10BE

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