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Typography and Sketch of Problem 547. Triangle, Transversal, Four Circumcircles, Concurrency, iPad Apps

The figure shows a triangle ABC with a transversal DEF (F on the extension of AC). Prove that the circumcircles of triangles ABC, BDE, ECF, and ADF meet at a point G.
 

Typography and Sketch of Problem 547 Triangle, Transversal, Four Circumcircles, Concurrency, iPad Apps


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 547
 

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Last updated Feb 2, 2018