Question

In the figure 'O' is the centre of the circle . if angle AOB =80. find the measure of angle OCB and angle OBC​

Answer 1

Answer:

angle boc=100 degree

Step-by-step explanation:

Answer 2

Step-by-step explanation:

angle AOC +80°=180°[linear pair]

angle AOC =180°-80°=100°

Now

OC=OB [radii of the circle]

angle OBC =angle OCB

Then,

angle OBC+angle OCA+angle AOB=180°

x°+x°+100°= 180°

2x° + 100° =180°

2x°= 180°-100°

=80°

x° =80°÷2

=40°

angle OCB =angle OCB =40°