Two chords AB and AC of a circle with centre O are on the opposite sides of OA. Then, `angleOAB=angleOAC`.
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In figure, AB and AC are two chords of a circle. Join OB and OC. In `Delta OAB and DeltaOAC`, OA=OA [common side] OB=OC [both are the radius of circle] Here, we arer not able to show that either the any angle or third side is equal and `Delta OAB` is not congruent to `DeltaOAC`. `:.angleOAB ne angleOAC`.
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