Question

In triangle ABC, AB is the longest side , prove that AngleC=60°​

Answer 1

Answer:

In triangle ABC AB is longest side

To prove- AC= 60°

Angle A+ B+ C=180°( by angle sum property).

If AB is the longest side so the anle opposite it's also Greater.Angle C is greater.So, by Angle sum property. Angle A+B+C=180°If C> B and A .No it is not possible that C>B,A.

It means It is a equilateral triangle.so,

A+B+C= 180°

A=60

B=60

C=60.