Relations
- broader:
- (en) Quadrilateral
- (en) Trapezium or trapezoid
- narrower:
- (en) Rectangle
- (en) Rhomboid
- (en) Rhombus
- (en) Square
- (en) Varignon parallelogram
- references:
- (en) Parallel
- referenced:
- (en) Area of a parallelogram
- (en) Parallelepiped
- (en) Varignon's theorem
Funded by: EU Socrates Minerva, HeyMath!, Cambridge University Press