Question

the area of ssector of circleof radius 8cmis 16pie sq cm. find the length of correspondng arc

Answer 1

area of sector= length of arc x radius/2
l x 8/2=16 pie
l= 4 pie

Answer 2

Area of sector= length of arc× radius/2
= 90°/ 360° × 2π × 8
= 4π cm