# maths

A wire from a square of area 324 cm2. If A wire from a semicircle then area becomes ------

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1. length of wire=4*sqrt(324)
perimeter of semicircle=D+PI*D/2
4 sqrt(324)=D(1+PI/2)
D= 4sqrt(324)/(!+PI/2)
then the area of the enclosed semicircle is
Area=1/2 * PI*(D/2)^2
Area=1/2*PI*1/4*(D^2)
Area=PI/8 * 16*324/(2.57)^2
area=308.21845

check that.

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