Geometry Problems 561 - 570

Problem 561.
Triangle, Cevian, Incenter, Incircle, Perpendicular, Tangent.

Problem 562.
Triangle, Cevian, Incenter, Perpendicular, Concyclic Points, Cyclic Quadrilateral.

Problem 563.
Regular Pentagon, Center, Rectangle, Diagonals, Angle.

Problem 564.
Complete Quadrilateral, Incenter, Excenter, Concyclic Points, Incircle, Excircle.

Problem 565.
Triangle, Isogonal lines, Angles, Congruence, Concyclic Points.

Problem 566.
Quadrilateral, Diagonals, Parallel.

Problem 567.
Right triangle, Incircle, Excircle, Collinear tangency points.

Problem 568.
Triangle, Excircles, Tangency Point, Congruence.

Problem 569.
Quadrilateral, Excircles, Tangency Points, Congruence.

Problem 570.
Square, Center, Right Triangles, Congruence, Collinearity.