Geometry Problem 6 with Solution: Triangle, Angles, Double-Angle, Congruence, Auxiliary Lines

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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

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

Geometry Problem 6 with Solution: Triangle, Angles, Double-Angle, Congruence, Auxiliary Lines

Art of Geometry Problem 6 using Mobile Apps. Circle Patterns.

Geometry Problem 6 Solution(s)