`DeltaABC` is an isosceles triangle with `AB=AC`, side BA is produced to D such that AB=AD. Prove that `angleBCD` is a right angle.

abc is an isosceles triangle with AB=AC . Side BA is produced to D such that AB=AD. Prove that /_BCD is a right angle

Delta ABC, AB = AC and BA is produced to D such that AC = AD. Then the angleBCD is

ABC is an isosceles triangle with AB=AC and D is a pooint on AC such that BC^(2)=ACxCD .Prove that BD=BC

In the adjoining figure, DeltaABC is an isosceles triangle in which AB = AC and AD is the bisector of angleA . Prove that: angleB=angleC

In the adjoining figure, ABC is an isosceles triangle in which AB = AC. Also, D is a point such that BD = CD. Prove that AD bisects /_ A and /_D

DeltaABC is an isosceles triangle with AB=AC=13cm . AD is the median on BC from A such that AD=12cm . The length of BC is equal to :