Question

in an isosceles triangle with AC= BC.IfAB^2=2AC^2prove that ABC is right angled triangle ​

Answer 1

if AC=BC

AB²=2AC²

AB²= AC²+AC2

AB²= AC²+BC² (AC=BC)

AND THIS PYTHAGORAS FORMULA ARE FOLLOWED IN RIGHT ANGLES ONLY

SO IT IS A RIGHT ANGLED TRIANGLE