Question

If the perimeter of
semicircle is
36 cm find its
diameter​

Answer 1

Perimeter of semicircular protractor=36 cm

πr+2r=36

⇒(π+2)r=36

⇒(

7

22

+2)r=36

⇒

7

36

r=36

⇒r=

36

36×7

⇒r=7

Therefore, diameter =2r=2×7=14 cm

Answer 2

Answer:

the longest diemeter is 15 cm .....

I hope you anderstand .....