Question

A wire is in the shape of a square of side 9 cm. If the wire is bent and shaped in the
form of a semi-circle, find the radius of the semi-circle so formed.​

Answer 1

Answer:

√51.54

area of square = 9*9

= 81cm²

area of square =. area of semi circle

area of semi circle= 81cm²

81=1/2*22/7*r*r

r² = 81*7/11

r = √51.54