Question

plz give full solution

Answer 1

Step-by-step explanation:

Theta1= angle AOB=80 degree

Theta2= angle BOC

Radius = r

(i) Length of arc AB= 2 length of arc BC

theta1/ 360 x 2 pi r= 2( theta2/ 360x 2 pi r)

theta1 = 2 theta2

angle BOC= angle AOC/2

= 80/2

angle BOC=40 degree

(ii) angle AOC= angle AOB + BOC

=80 +40

=120 degree