Typography of Geometry Problem 1292: Square, Circle, Right Triangle, Arc, Inradius, Radius, Incircle, Measurement, iPad Apps

Proposition

The figure below shows a square ABCD inscribed in a circle of center Q and a right triangle AED (angle AED = 90 degrees) with inradius r. If r₁ is the radius of a circle tangent to AE, ED, and arc AD, prove that r₁ = r.sqrt(2).

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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 1292