Geometry Problem 868: Cyclic Quadrilateral, Circle, Five Rectangles, Four Centers, Congruence, Typography, iPad Apps

Proposition

The figure below shows a cyclic quadrilateral ABCD. ABEF, BCGH, CDJK, and ADLM are rectangles of centers O1, O2, O3, and O4, respectively, so that AF = CD, BH = AD, CK = AB, and DL = BC. Prove that O1O2O3O4 is a rectangle.


Typography of Geometry Problem 868: Cyclic Quadrilateral, Circle, Five Rectangles, Four Centers, Congruence. Math Infographic, Tutor


Geometric Art using Mobile Apps

Geometric art is a form of art based on the use and application of geometric figures. A geometric figure is any set or combination of points, lines, surfaces and solids.

A mobile app or mobile application software is a computer program designed to run on smartphones and tablet computers.

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Original problem 868.

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