Question

How would I prove the congruency of these triangles?

Answer 1

Explanation:

As O is the mid point of the circle

Similarly, B also becomes the mid point of the line AC.

So, line OB divides AB and BC equally.

Hence, lines AB = AC, but they are asking to prove congruency of triangles.

So, u have to join OA and OC.

Same way, line OB divides ∠OBA and ∠OBC.

So it is proved that AB = AC

Answer 2

Explanation:

the radius cuts the segment into two equal parts because it is perpendicular to the chord