Find the perimeter of a semi - circular protractor of radius 7/2 cm. Also , find its area .
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perimeter of semicircular protactor=(2×22/7×7/2)÷2
perimeter of semicircular protactor=22/2
perimeter of semicircular protactor=11cm
area of semicircular protactor=22/7×(7/2)^2
area of semicircular protactor=22/7×49/4
area of semicircular protactor=77/2cm
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perimeter of semicircular protactor=(2×22/7×7/2)÷2
perimeter of semicircular protactor=22/2
perimeter of semicircular protactor=11cm
area of semicircular protactor=22/7×(7/2)^2
area of semicircular protactor=22/7×49/4
area of semicircular protactor=77/2cm
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