Geometry Problem 291: Triangle, Circle, Circumradius, Perpendicular.


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.

Geometry Problem 291: Triangle, Circle, Circumradius, Perpendicular

See also
Conformal Mapping or Transformation of Problem 291

Art of Geometry Problem 291 using Mobile Apps. Circle Patterns


Art of problem 291 Triangle, Circle, Circumradius, Perpendicularpatterns, using mobile apps, iPad, iPhone

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.

Recent Additions

Geometry Problems
Ten problems 291-300
Visual Index
Open Problems
All Problems
Tangent Line
iPad Apps
View or Post a solution