Explanation Formula used: “Let r be the radius of the circle and a is the central angle given in radians. Then, Arc length S = r a Area A = 1 2 r 2 a ”. “To convert angle measurement from degrees to radians, use the following formula: Radians = degrees ⋅ π 180 ° ”. Calculation: The given central angle is 40 ° and the radius of the circle, r is 30 cm. Covert the angle to radians using the above formula as, 40 ° = 40 ° ( π rad 180 ° ) = 40 ⋅ π 180 rad ≈ 0.698 rad Thus, the angle 40 ° can be written in radians as 0.698 rad. Substitute r = 30 and a = 0.698 in S = r a , S = r a ≈ ( 30 cm ) ( 0

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ISBN: 9780100803053

Author: SAUNDERS

Publisher: YUZU

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Chapter 10.1, Problem 21CE

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To calculate: The arc length and area and round it to nearest whole number if necessary.

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Chapter 10.1, Problem 20CE

Chapter 10.1, Problem 22CE

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The arc length and area and round it to nearest whole number if necessary.

Solution Summary: The author calculates the arc length and area and round it to nearest whole number if necessary.

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To calculate: The arc length and area and round it to nearest whole number if necessary.

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