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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.

Contributed by: Alvaro Jose Ibarra Rivas (Institucion Educativa Santa Fe, Santiago de Cali - Colombia)

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Area (Wolfram MathWorld)

Quadrilateral (Wolfram MathWorld)

Triangulation (Wolfram MathWorld)

"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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Related Curriculum Standards

Common Core State Standards for Mathematics

HSG-GPE.B.7

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Area of a Quadrilateral by Triangulation

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