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Triangles perspective to a line are perspective to a point
Author:
Alex Kreitzberg
GeoGebra
New Resources
apec
Linear Equation Graphs: Thin Slice
Untitled
Congruent Sides & Angles in △s: Exploration
Pythagorean Theorem: Quick Illustrator
Discover Resources
Start, 45 degree angle
triangle generator
A generalization of Van Aubel's theorem
(*)Pulcinella eating "frappe"- Giorgio Scarselletta (IT)
Ext Angles of Polygon: Moving to a Point