how can we find the area andperimeter of semicircle??what's the formulas???
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Perimeter of semicircle = pi * radius
Area of semicircle = 1/2 * pi * radius^2.
Area of semicircle = 1/2 * pi * radius^2.
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The perimeter of a circle is π × d where d is the diameter so half of that is 1/2 π × d. But If you are going to walk around a semicircle you need to go half way around the circle and then across a diagonal to get back to where you started so the perimeter is 1/2 π × d + d.
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