In `DeltaABC`, the bisector AD of A is perpendicular to side BC Show that AB = AC and `DeltaABC` is isosceles.

In DeltaABC , AD is the perpendicular bisector of BC (See adjacent figure). Show that DeltaABC is an isosceles triangle in which AB = AC.

In Delta ABC , AD is the perpendicular bisector of BC. Show that Delta ABC is an isoscelss tringle in which AB = AC.

In triangleABC, AD is the perpendicular bisector of BC. Show that triangleABC is an isosceles triangle in which AB = AC.

In a DeltaABC , if D is the middle point of BC and AD is perpendicular to AC, then cos C equals

If p is the length of perpendicular from A to BC in a DeltaABC, then:

AD and BC are equal perpendiculars to a line segment AB. Show that CD bisects AB.

AD and BC are equal and perpendiculars to a line segment AB. Show that CD bisects AB.

DeltaABC is an isosceles triangle in which AB = AC. Show that /_ B = /_ C.

In DeltaABC, D, E and F are the midpoints of sides AB, BC and CA respectively. Show that DeltaABC is divided into four congruent triangles, when the three midpoints are joined to each other. (ΔDEF is called medial triangle)

In the figure, AC = AE, AB = AD and BAD = EAC. Show that BC = DE