In the figure below, ABC is a triangle with circumradius R. DE is perpendicular to BC and DF is perpendicular to AB.
If AC = b, BD = d, and EF =e, prove that 2R.e = b.d.

Conformal Mapping or Transformation of Problem 291

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.