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প্রমাণ কর ত্রিভুজের দুটি বাহুর দৈর্ঘ্য সমান হলে তাদের বিপরীত কোণগুলি পরস্পর সমান হবে

Answers 1

Answer:

Prouved

Step-by-step explanation:

△ABC in which ∠B=∠C.

To prove :

AB=AC

Construction :

Draw the bisector of ∠A and let it meet BC at D.

Proof :

In △s ABD and ACD,

∠B=∠C

∠BAD=∠CAD

AD=AD

So, by AAS criterion of congruence,

△ABD≅△ACD

⟹AB=AC

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