### Proposition

The figure below shows
a triangle ABC with three rectangles ABDE, BCFG and ACHJ. Lines AN, BP, and
CQ are perpendicular to EJ, DG, and FH, respectively.
Prove that lines NA, PB, and QC are concurrent.

## Sketch of Problem 1396 using iPad Apps

## Circular Patterns of Problem 1396 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.