Geometry Problems 621 - 630

Geometry Problem 621
Three Rectangles, Diagonals, Centers, Angles.

Geometry Problem 622
Square with Perpendiculars, Transversal, Congruence.

Geometry Problem 623
Triangle, Incenter, Excenter, Incircle, Excircle, Concyclic Points.

Geometry Problem 624
Triangle, Incenter, Excenter, Incircle, Excircle, Similarity.

Geometry Problem 625
Triangle, Parallel Lines, Congruence, Angle Bisector.

Typography of Geometry Problem 625.

Geometry Problem 626
Triangle, Distance from the Incenter to an Excenter.

Geometry Problem 627
Cyclic Quadrilateral, Congruence, Concyclic Points.

Geometry Problem 628
Cyclic Quadrilateral, Congruence, Parallel Lines.

Geometry Problem 629
Triangle, Perpendicular to Sides, Intersecting Lines, Altitude.

Geometry Problem 630: Clawson Point.
Orthic and Extangents Triangles, Concurrent lines.