Geometry Problem 701: Intersecting Circles, Diameter, Perpendicular, Angles, Congruence

The figure shows the intersecting circles O and O' at A and B. AB is the diameter of circle O', CD is perpendicular to AB and EDF is perpendicular to OD. Prove that angles ACF and BCE are congruent.
  

Intersecting circles, Diameter, Perpendicular, Angles, Congruence
 


 

Art of Geometry Problem 701 using Mobile Apps. Circle Patterns

Art of Geometry Problem 701 using Mobile Apps. Circle Patterns
 

Art of Geometry Problem 701 using Mobile Apps. Circle Patterns

Geometric Art using iPad or Mobile Apps 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.

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