Question

Find the area and perimeter of the circle with the following :

 Diameter = 77 cm 

Answer 1

Di am eter = 2 r

`=> "r" = "diameter"/2 = 77/2 = 38.5 "cm"`

Area of the circle = πr² 

`= 22/7 xx 38.5 xx 38.5`

= 4658.5 cm²

Perimeter of the circle = 2πr

`= 2 xx 22/7 xx 38.5`

= 242 cm

Therefore, Area= 4658.5 cm² and Perimeter= 242 cm