Cyclic Quadrilaterals, Subtriangles, and Incenters
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The incenters of the four triangles determined by the vertices of a cyclic quadrilateral taken three at a time form a rectangle.[more]
Drag the blue points on the circle to reshape the blue quadrilateral and the red rectangle.[less]
Contributed by: Jay Warendorff (March 2011)
Open content licensed under CC BY-NC-SA
"Cyclic Quadrilaterals, Subtriangles, and Incenters"
Wolfram Demonstrations Project
Published: March 7 2011