Question

in the given figure O is the centre of the circle if angle AOC equals to 130 degree then find angle abc according to theorem​

Answer 1

∠AOC=130°

∠ABC = 1/2∠AOC (angle substended by an arc is half the angle substended by an arc at the centre )

=130/2

=65°

∴∠ABC=65°

Answer 2

acc to your question angle ABC will be 50degree