quadrilateral with orthogonal diagonas

Autor:benedict heal

Given a quadrilateral whose diagonals are perpendicular, the reflections in each side of the point of intersection of the diagonals form a cyclic quadrilateral.

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Hypocycloids
Involute of the Circle
גיליון אלקטרוני להעלאת נתוני בעיה ויצירת גרף בהתאם
רישום חופשי
Translation of the Graph of a Function

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forum1
The Orthocenter and CIrcumcenter are Isogonal Conjugates
Basic Terms in Algebra
Ring of Spheres-3d
Untitled
The 10 perpendiculars.

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