Question

Angle d= angle e and ad/db= ae/ec prove ABC is isosceles triangle

Answer 1

consider triangle ABC in which BD is perpendicular to AC and EC perpendicular to AB.

 in triangle ABC
angle D = angle E = 90 degree ( angle D and angle E are perpendicular to AC & AB) (GIVEN)

AD/DB = AE/EC (GIVEN) 
==> BD = EC.
And  AB = AC.
therefore triangle ABC is an isoceles triangle .


hope it helps you:)

Answer 2

ur ans is done in pencil . hope u understand