Answer:

Explanation:
Given : AC is the perpendicular bisectore of ZB
i.e

In

OA=OA
By reflexive property of equality
OB=OZ
AC is a perpendicular bisector of BZ.

Because AC is perpendicular to BZ

By SAS (Side-Angle-Side) postulate

By CPCT( corresponding parts of congruent triangles are congruent).