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Parallels In an Isosceles Triangle Making a Parallelogram
Parallels In an Isosceles Triangle Making a Parallelogram

Parallels In an Isosceles Triangle Making a Parallelogram

The video is a proof of the proposition “If from any point in the base of an isosceles triangle parallels to the equal sides are drawn, a parallelogram is formed whose perimeter is equal to the sum of the equal sides.” (p. 159 Plane Geometry by Welchons and Krickenberger, (c) 1943)

The full version.

The summary.

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