Oriented Triangle Angles
Published in Wolfram Demonstrations Project • Apr 27, 2007
NobleIDNI0P98W77R87S63
Abstract
Drag a vertex across an edge to invert the orientation of the triangle. The angle measures give the counterclockwise rotations needed to align adjacent edges. The sum of the interior angles is always 180°, but the sum of the exterior angles is 900°.
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