what is radius and area of semi circle???
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he formula for a circle's circumference, C, is C = 2 * pi * r, where r is, again, thecircle's radius. A semicircle is half a circle, however, so we'll need to divide the formula for perimeter by two just like we did the formula for area. The perimeter P = pi * r.
mysticd:
What about the area of the semi circle
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Area of a circle = πr²
Radius of circle = r
⇔ Area of semi circle = πr²÷2
Radius of semicircle =
Radius of circle = r
⇔ Area of semi circle = πr²÷2
Radius of semicircle =
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