Varignon's theorem

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 as big as the area of the quadrangle. http://en.wikipedia.org/wiki/Varignon%27s_theorem

 

Sundararajan

 
Resource Type
Activity
Tags
area  geometry  quadrilateral 
Target Group (Age)
10 – 18
Language
English
 
 
GeoGebra version
4.4
Views
1530
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