ABC is an equilateral triangle. D and E are the mid-points of AB and AC. Then `angleADE=`

Delta ABC is an equilateral triangle and D and E are midpoints of AB and BC respectively. Then the area of Delta ABC : the area of the trapezium ADEC is

ABC is equilateral triangle and D,E are middle points of sides AB and AC then length of DE is

ABC is an isosceles triangle in which AB=AC. If D and E are the mid-points of AB and AC respectively,prove that the points B,C,D and E are concylic.

ABC is an isosceles triangle in which AB=AC. If D and E are the mid-points of AB and AC respectively,prove that the points B,C,D and E are concyclic.

B is a vertex of the isosceles triangle ABC. D and E are the mid-points of AB and AC. If BE and CD intersects each other at F prove that DeltaBDE=3DeltaDEF .

In an equilateral triangle ABC, D, E, F are the mid-points of AB, BC and AC respectively.The quadrilateral BEFD is are a (A) Square (B) Parallelogram (C) Rectangle (D) Rhombus

ABC is an isosceles triangle in which AB = AC. If D and E are the mid-points of AB and respectively, prove that B,C,D and E are concyclic.

If in a triangle ABC and D,E are the mid- points of AB and AC respectively,then vec DE is equal to