Geometry Problems, Online Education

 

van Aubel's Theorem: Quadrilateral with Squares, Congruence, 90 Degrees with Animation.

Given an arbitrary planar quadrilateral UTAH, place a square outwardly on each side, and connect the centers of opposite squares: M, O, N, and Y. Then van Aubel's theorem states that the two lines MO and NY are of equal length and cross at a right angle.

 

 


 

van Aubel's Theorem: Quadrilateral with Squares, Congruence, 90 Degrees for Tablets, iPad, Nexus, Galaxy
See also: Interactive step-by-step animation using GeoGebra

 

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