Play through the sketch to see how to construct a midpoint quadrilateral. What kind of shape is the midpoint quadrilateral? Be as precise as possible. Then, try to generalize.
MacKay: Angle bisector, perpindicular lines, and mid point
sum of co-interior angles equal 180 degrees
Parallel Line Angle Relationship
Triangle with given sides (SSS)
testfileWed Oct 17 20:30:19 CEST 20180.046674271827526925