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Area of a Quadrilateral by Triangulation
This Demonstration calculates the area of a quadrilateral by triangulation using Heron's formula for each of two triangles. If the quadrilateral is reflex (not convex), proper care is taken in order not to add up the overlapping triangles.



"Area of a Quadrilateral by Triangulation" from The Wolfram Demonstrations Project
 http://demonstrations.wolfram.com/AreaOfAQuadrilateralByTriangulation/
Contributed by: Alvaro Jose Ibarra Rivas (Institucion Educativa Santa Fe, Santiago de Cali - Colombia)
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