Question

In the diagram below ABC are the vertices of a triangle; DE are the midpoints of AB,AC respectively; and F is the midpoint of AD; O is the intersection point of the lines EF and CD. Select ALL answers that MUST be true.

Answer 1

A. DE=1/2FC
B. DE is parallel to FC
C. 1/2AC=DE
D. DE is parallel to AC
E. DO=1/2OC

Answer 2

C. 1/2AC=DE
D. DE is parallel to AC