Question

If the equal sides of an isosceles triangle are produced, prove that the exterior angles so formed are obtuse and equal​

Answer 1

Step-by-step explanation:

let the angles be X

X+X+X=180°

3X=180°

X=180/3

X=60

interior angle+exterior angle( in the base)=180°

60°+exterior angle=180°

exterior angle=180°-60°

=120°