4.3 - 4.4 Investigate Desargues' Theorem
I hear and I forget;
I see and I remember;
I do and I understand.
—Ancient Proverb

Axiom 5. (Desargues' Theorem) If two triangles are perspective from a point, then they are perspective from a line.

Drag the points in red to investigate.
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4.3 DualityBack to Duality     4.4 Desargues' TheoremBack to Desargue's Theorem

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  Timothy Peil  Mathematics Dept.  MSU Moorhead

© Copyright 2005, 2006 - Timothy Peil