Typography of Geometry Problem 63: Regular Heptagon, side and diagonals, iPad Apps

Proposition

In the figure below, let s be the side length, c = AC, and d = AD of a regular heptagon ABCDEFG. Prove that: 1/s = 1/c + 1/d.

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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.

See also:
Original problem 63.