new theorem of pythagoras for circumferences

Author:
Oktay Haracci
Topic:
Centroid or Barycenter, Circle, Circumcircle or Circumscribed Circle, General Quadrilateral, Geometric Distribution, Geometric Mean, Geometry, Perimeter, Plane Figures or Shapes, Planes, Polygons, Pythagoras or Pythagorean Theorem, Quadrilaterals, Symmetry, Geometric Transformations