Question

in given figure O is the centre of the circle if <AOC=130° then find <ABC​

Answer 1

$\huge\pink{Heya!!!\:Mate}$

ABC = half of AOC (angle substended by an arc is half the angle substended by an arc at the centre )

=130÷2

=65.....

I hope it helps you...

Answer 2

With the help of theorem

angle subtended by the arc at centre is double the angle subtended at any point on the circle

Reflex of angle aoc = 230 deg.

And reflex aoc = 2 abc

Therefore abc = 230/2

= 115 deg answer