AAS (Angle-Angle-Side) Congruence rule and Proof

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Friends,
This is a Math video. This is our fifth webisode (WB-5) on "Series 7 -- Triangles".
In this video, we learn "AAS" or "Angle-Angle-Side" congruence rule.
We learn when we can say that any two given triangles ABC and PQR (say) are congruent as per AAS congruence rule. Then we prove AAS congruence rule.
We also see that if two triangles are congruent, then their corresponding sides and angles are also equal.
This video is suited for class-9 (Class-IX) or grade-9 kids.
Cheers,
Friends at Rising Pearl