Circunferencia y triangulo Equilátero

Topic:Angles, Area, Circle, Circumcircle or Circumscribed Circle, Constructions, Coordinates, Ellipse, Equilateral Triangles, Geometric Mean, Geometry, Incircle or Inscribed Circle, Isosceles Triangles, Mathematics, Pie Chart or Circle Chart, Polygons, Right Triangles, Scalene Triangles, Similar Triangles, Geometric Transformations, Triangles, Trigonometry