perimeter of a protractor is 36. Find its area
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since it is protractor it is a semicircle
the of semicircle is πr+2π
36=πr+2π
36=r(π+2)=r
36/22/7+2=r
36*7/14+22=r
252/36=r
7=r
r=7
so area of semicircle is =1/2*πr²
=1/2*22/7*7²
=1/2*22*7
=11*7
area
=77
the of semicircle is πr+2π
36=πr+2π
36=r(π+2)=r
36/22/7+2=r
36*7/14+22=r
252/36=r
7=r
r=7
so area of semicircle is =1/2*πr²
=1/2*22/7*7²
=1/2*22*7
=11*7
area
=77
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