Geometry Problem 1241:
Quadrilateral, Four Exterior Angle Bisectors, Cyclic
Quadrilateral, Circle. Mobile
College, High School.
In a quadrilateral ABCD, the
bisectors of the exterior angles A, B, C, and D intersect at A1,
B1, C1, and D1, as shown in the figure below. Prove that
quadrilateral A1B1C1D1 is cyclic.
Art of Geometry Problem 1241 using Mobile Apps. Circle Patterns.
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.