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The area of a semicircle is half of the area of a circle. The area of a circle is pi x radius x radius. So the area of a semicircle is 1/2 x pi x radius x radius or (pi x radius x radius) / 2.
area = π x radius2 → radius =√(area/π) circumference = 2 x π x radius = 2 x π x √(area/π) = 2 x √(area x π) = 2 x √(121 cm2 x π) = 22 √π cm
Area = length x width Area = 100cm x 100cm Area = 10000cm2
radius squared x 3.14 = area diameter squared x 3.14 / 4 = area
Radius x 2 x 3.14 = Area * * * * * That is the formula for the circumference! The area = pi*radius2