In the figure below, AB = CD, angle A = 2x,
and angle BCD = 3x. Find x. Try to use elementary geometry (Euclid's Elements.)
![Geometry Problem: Congruence](problem006-triangle-angle-t.jpg)
See solution below
Art of Geometry Problem 6 using Mobile Apps. Circle Patterns.
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
sketch art.
![Art of problem 6 using mobile apps, iPad, iPhone](problem006-art-mobile-apps-pattern-ipad-iphone-7.gif)
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