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Geometric Artwork of Problem 163. Trapezoid, Triangle, and Area. PicSketch for iPad

Geometric Art of Problem 163. Trapezoid, Triangle, and Area. iPad apps.

In the figure above, ABCD is a trapezoid of area S with AD parallel to BC and E the point of intersection of the diagonals AC and BD. If S1, S2, S3, and S4 are the areas of triangles BEC, AED, ABE, and CED respectively, (1) prove that Trapezoid proof 1, and (2) prove that Trapezoid proof 2. See also: Problem 163.


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