Geometry Problem 1403: Quadrilateral, 90 Degree Angle, Perpendicular, Congruence
Proposition
The figure below shows
a quadrilateral ABCD, AB = AD, angle ABC = angle ADC = 90 degrees. If AN
and DM are perpendicular, prove that AM and BN are perpendicular.
This entry contributed by Erina-NJ.
Poster of Problem 1403 Sketching, Typography, Art using iPad Apps
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.
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