Question

In a triangle ABC, D and E are the mid points of AB and AC respectively. If DE|| BC and

BC = 10 cm, find DE. Give the reasons

Answer 1

DE = 5 cm

Explanation:

Using the midline theorem.

A segment joining the midpoints of 2 sides of a triangle DE and parallel to the third side BC is one half the length of the third side, that is

DE = 0.5BC = 0.5 × 10 = 5