let ABC be a triangle with AB=AC. If D is the mid-point of BC, E the foot of the perpendicular drawn from D to AC, F is the mid-point of DE. Prove that AF is perpendicular to BE.

Let ABC be a triangle with AB=AC. If D is the midpoint of BC,E is the foot of the perpendicular drawn from D to AC, and F is the midpoint of DE, then prove that AF is perpendicular to BE.

If D is the mid-point of the side BC of triangle ABC and AD is perpendicular to AC, then

If D is the mid-point of side BC of a triangle ABC and AD is perpendicular to AC, then

In a Delta ABC, if D is the mid point of BC and AD is perpendicular to AC, then cos B=

If D id the mid-point of the side BC of a triangle ABC and AD is perpendicular to AC , then

If D id the mid-point of the side BC of a triangle ABC and AD is perpendicular to AC , then

In a Delta ABC , if D is the mid point of BC and AD is perpendicular to AC , then cos B =

ABC is a triangle and D is the mid-point of BC .The perpendiculars from D to AB and AC are equal.Prove that the triangle is isosceles.

In triangle ABC, D is mid point of BC, if 'AD' is perpendicular to 'AC then cos A cos C