If the perimeter of a protractor is 36cm find its area
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Protractor is in the shape of semi circle.
So the perimeter = circumference = 36 cm
Circumference of semi circle = 2πr/2
36 = 2πr/2
36 × 7 ×2/22×2 = r/2
11.45 cm
area of the protractor = πr²
= 22/7 * 11.45 ²
= 411.87 cm²
So the perimeter = circumference = 36 cm
Circumference of semi circle = 2πr/2
36 = 2πr/2
36 × 7 ×2/22×2 = r/2
11.45 cm
area of the protractor = πr²
= 22/7 * 11.45 ²
= 411.87 cm²
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