Medians AD, BE, and CF split a triangle ABC into six smaller triangles. Prove that their circumcenters O1, O2, O3, O4, O5, and O6 are concyclic
(lie on a circle called van Lamoen circle).
The figure below was created using the
Geometry Designer for iPad.
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Geometry Designer is an apps for Math Education on iPad,
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Download on the App Store: Geometry Designer  McTavish Solutions LLC.
