Concyclic

Autor:FUKUCHAN

Given triangle ABC and point D on AB. O1 is circumcircle of triangle ADC, O2 is circumcircle of triangle DBC. E on AB, F on O1, G on O2, EF//BC, and EG//AC. Please prove that points D, E, F, and G are concyclic.

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Regular Polygons and Equivalent Triangles
The Gardener's Ellipse
Rectangle Construction Template (V2)
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Igball's assignment
การลบเลข 2หลัก
Addizione algebrica
Working Model of Pythagoras Theorem- Final
Sierpinski Tetrahedron

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