Ruturaj S.
asked • 12/22/17Area of a semicircular protractor is 38.5 cm . Find its radius and perimeter
Finding radius and perimeter of semicircle if area is given
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1 Expert Answer
Andy C. answered • 12/22/17
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4.9
(27)
Math/Physics Tutor
Area = 1/2 * pi * radius^2
A= 1/2*pi*R^2
38.5 = 1/2*22/7*R^2
38.5 = 11/7 * R^2
24.5 = R^2
R = 4.95
D = 9.9
Perimeter or circumference is 1/2*9.9*pi = 15.55
Ruturaj S.
Thankq
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12/22/17
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Kenneth S.
12/22/17