quadrilateral with orthogonal diagonas

Author: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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רישום חופשי
bewijs stelling van Pythagoras
Average Distance
Angles of Intersecting Lines
Toroidal Spiral

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Round5_Tiger
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พื้นที่ผิวปริมาตร
Exterior angle