Typography of Geometry Problem 180: Circles Tangent Externally, Common External Tangents, Areas, iPad Apps

Proposition

In the figure below, circles A and B are tangent externally. CD and EF are the common external tangents. Lines AD, AF, BC, and BE determine the shaded regions of areas S, S1, and S2, (1) Prove that S1 = S2, (2) S = S1 + S2.


Geometry Problem 180. Circles Tangent Externally, Common External Tangents, Areas, iPad Apps, Software. Math Infographic, Tutor


Geometric Art using iPad or 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 180.

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