The figure shows a quadrilateral ABCD and lines EFGH, JKLM, NKFP, and QLGR. If quadrilaterals AEFP, BNKJ, CMLQ, DRGH, and FKLG are tangential or circumscribed quadrilaterals, prove that quadrilateral ABCD is also a tangential quadrilateral.
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.
Original problem 1175.