Theorem 10 - The Diagonals of a Parallelogram
This shows that the diagonals of a parallelogram will always bisect each other. This means that the point F will always be the midpoint of each diagonal.
Drag the points to change the shape of the parallelogram. Are the diagonals always equal in length? Change the parallelogram so that the diagonals are equal in length. What is this figure called?