Show E is the midpoint of the segment MN. GSP file. Open this to vary the shape of the trapezoid. Note: If c = MN, then c is the harmonic mean of a and b.

Show E is the midpoint of the segment MN.

GSP file. Open this to vary the shape of the trapezoid.

Note: If c = MN, then c is the harmonic mean of a and b.