Geometry Problem 1461: Quadrilateral, Triangle, Angles, 30-60 Degree, Congruence, Auxiliary Lines

The figure below shows a quadrilateral ABCD with angle CAD = 30 degrees, angle BAC = 35 degrees, angle ABC = 110 degrees, and angle BCD = 130 degrees. Find the measure of angle BDC. Try to use elementary geometry (no trigonometry).
Geometry Problem 1461: Quadrilateral, Triangle, Angles, 30-60 Degree, Congruence, Auxiliary Lines


Poster of Problem 1461 using iPad Apps

Poster of Geometry Problem 1461: Quadrilateral, Triangle, Angles, 30-60 Degree, Congruence, Auxiliary Lines, iPad Apps, Typography, Poster. Math Infographic, Tutor

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.