Question

OA=OD AND ANGLE 1=ANGLE 2.PROVE THAT TRIANGLE OCB IS AN ISOSCELES TRIANGLE

Answer 1

As base angles are equal. OA and OD are base angles.

Answer 2

If an isosceles triangle if two sides are equal then the opposite angles are also equal so as OA = OD and <1 = <2. Triangle OCB is an isosceles triangle