The figure below shows a cyclic quadrilateral ABCD. ABEF, BCGH, and CDJK are rectangles of centers O1, O2, and O3, respectively, so that AF = CD, BH = AD, and CK = AB. Prove that the measure of angle O1O2O3 is 90 degrees.
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 866.