Varignon's theorem (Varignon parallelogram)

Description

The Varigons theorem states that :
The midpoints of the sides of an arbitrary quadrangle form a parallelogram. If the quadrangle is convex or reentrant, i.e. not a crossing quadrangle, then the area of the parallelogram is half the area of the quadrangle.
The perimeter of the Varignon parallelogram equals the sum of the diagonals of the original quadrilateral.

Related formulas

Variables

aSide of the Varignon parallelogram (m)
bSide of the Varignon parallelogram (m)
cSide of the Varignon parallelogram (m)
dSide of the Varignon parallelogram (m)
mOne of the diagonals (m)
nThe other diagonal (m)