Question

8. ABC is a triangle Dis a point on AB such that AD=
AB
and E is a point on AC such that AE =
- AC. Prove that
DE = - BC.​

Answer 1

draw a triangle of ABC.  And left side of triangle write D in the mid of AB.

so, AD=AB

Right side of the triangle write E in the mid of AC

so, AE=AC

DE=BC draw a line in the mid of triangle and that is prove