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.
 
 

Geometry Problem 1403: Quadrilateral, 90 Degree Angle, Perpendicular, Congruence, Tutor

 


Art of Problem 1402, Circle Patterns using iPad Apps


Art of problem 1402, circle patterns, 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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