Question 847522
if a wire is bent into the shape of a square ,then the area enclosed by the squre is 81 cm.sq when the wire is bent into a semi -cercular shape the area enclosed by the semi circle will be
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Step 1:
Find the length of the wire
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Step 2:
Find the circumference + diameter made by that length
Use s for wire length
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For radius r:
{{{s = pi*r + 2r = r*(pi + 2)}}}
{{{r = s/(pi+2)}}}
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{{{Area = pi*r^2/2}}}