Question

1. Prove that the bisector of the vertical angle of an isosceles triangle is perpendicular to​

Answer 1

Answer:

Let ΔABC be the isoceleus triangle with AB=AC and AD as vertical angle bisector

AB=AC

∠B=∠C

∠BAD=∠CAD

So by ASA criteria the triangles are congruent.

⟹BD=DC

So the bisector of vertical angel bisects the base