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Plane Geometry: Open Problems, High School, College

Online education degree: Open geometry problems


Pythagoras curiosity. Online tutoring.

Geometry Problem 884: The Pythagorean Curiosity
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Right Triangles and squares, fifteen conclusions.

Intersecting Circles, Concyclic points

Geometry Problem 738.
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Intersecting Circles, External Common Tangent, Common Chord, Secant, Circumcircle, Cyclic Quadrilateral, Concyclic Points.

Circumscribed Quadrilateral, Angles

Geometry Problem 724.
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Circumscribed Quadrilateral, Circle, Angle, Incenter, Half the Measure.

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