Question

a wire is in the form of square whose side measure is 9 cm. It is straightened and bent into a form of a semicircle find the radius of the semicircle formed​

Answer 1

Length of wire is in the form of semicircle.

Given, length of wire =36 cm

Length of the wire =

2

1

(2πr)+2r

⇒36=(π+2)r

⇒36=(

7

22

+2)r=

7

36

.r

⇒r=7 cm