Etching and Typography of Archimedes' Book of Lemmas: Proposition 1 - Circle, Tangent, Diameter, Parallel Line, iPad Apps

Proposition

If two circles touch at A (internally), and if BC and DE are parallel diameters, then ACE is a straight lin.

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.

See also:
Original problem 640.