Answer :
To show that the midsegment ED is parallel to BC and that ED = 1/2BC in triangle ABC, we can use the properties of midsegments.
To show that the midsegment ED is parallel to BC and that ED = 1/2BC in triangle ABC, we can use the properties of midsegments.
Firstly, a midsegment of a triangle is a segment connecting the midpoints of two sides. In triangle ABC, let E be the midpoint of AB and D be the midpoint of AC.
Since E is the midpoint of AB and D is the midpoint of AC, we can conclude that DE is parallel to BC and DE = 1/2BC. Therefore, the correct option is a. ED || BC and ED = 1/2BC.