In the parallelogram ABCD, EF is the midpoint of AD and BC respectively The intersection of the center line BD and CE of triangle ABC with O, F and G is the midpoint of OB and OC respectively
Where is point m, n?
2. Prove: because the center line BD and CE of triangle ABC intersect at point o
So D and E are the midpoint of AC and ab respectively
Because F and G are the midpoint of OB and OC respectively
So de and FG are the median lines of triangle ABC and triangle OBC respectively
So de parallels BC
DE=1/2BC
FG=1/2BC
FG parallel BC
So de parallels FG
DE=FG
So the quadrilateral defg is a parallelogram