Triangle to Parallelogram

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Divide a triangle into a trapezoid and two small triangles using two lines, one connecting the midpoints of two sides, and one running from the apex along the altitude line. Rotate the small triangles to the sides of the trapezoid to form parallelograms, which can be rectangles, squares, rhombi or rhomboids.

Contributed by: Sándor Kabai (March 2008)
Recommended by: Stan Wagon
Open content licensed under CC BY-NC-SA


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