The figure below shows a triangle ABC with the angle B = 120 degrees and incenter I. If AD, BE, and CF are the bisectors of the angles A, B, and C, respectively, prove that AF + CD + 2EI= AC.
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 1304.