# Geometry Problem 1496: Triangle, Congruence, Isosceles, Double Angle, 30 Degrees

The figure below shows
a triangle ABC so that the measure of angle C is double the measure of
angle B, AC = AD, and BD = CD. Prove that angle ABD = 30 degrees.

View solution

## Typography and Sketch of Problem 1496: Sphinx and the Great Pyramid in the background

### 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.