`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

DeltaABC is an isoscelestriangle in which AB = AC. Side BA is produced to D such that AD = AB. Show that angleBCD is a right angle (see Fig. ).

DeltaABC is an isoscelestriangle in which AB = AC. Side BA is produced to D such that AD = AB. Show that angleBCD is a right angle (see Fig. ).

triangleABC is an isosceles triangle in which AB= AC. Side BA is produced to D such that AD = AB. Show that angleBCD is a right angle.

Delta ABC is an isosceles triangle in which AB = AC. Side BA is produced to D such that AD = AB. Show that BCD is a right angle.

DeltaABC is an isosceles triangle in which AB = AC. Side BA is produced to D such that AD = AB (see figure). Show that /_BCD is a right angle.

DeltaABC is an isosceles triangle in which AB = AC. Side BA is produced to D such that AD = AB (see figure). Show that /_BCD is a right angle.

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