Question

verify experimentally that if two sides of a triangle are equal then the opposite angles to them are also equal(two figure compulsory )​

Answer 1

Step-by-step explanation:

Given :

A △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