Geometry Problem 40

Triangle, Incenter, Excenter, 40, 60, 80 Degrees

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In a triangle ABC, the angles A and B measure 80 and 40 respectively, I is the incenter and E the excenter. AB and CE meet at D. If BC = a, AC = b and CI = d, prove that: \(DE= \dfrac{a \cdot (a-b)}{d}\).

 

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Flyer of problem 40 using iPad Apps

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Poster of problem 40

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.