Geometry Problem 1143: Triangle, Circumcircle, Tangent Line, Reflection of a Point over a Line, Tangent Circles, Collinear Points

Geometry Problem. Post your solution in the comments box below.
Level: Mathematics Education, High School, Honors Geometry, College.

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Geometry Problem 1059: Triangle, Circumcircle, Orthocenter, Altitude, Perpendicular, Reflection of a Point over a Line, Collinear Points, Simson Line, Congruence

Geometry Problem. Post your solution in the comments box below.
Level: Mathematics Education, High School, Honors Geometry, College.

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Dynamic Geometry Problem 974: 'Begonia Theorem', Cevian Triangle, Reflection of a point in a line, Concurrency of Lines

Geometry Problem. GeoGebra, HTML5 Animation for iPad and Nexus.
Post your solution in the comments box below.
Level: Mathematics Education, High School, Honors Geometry, College.

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Geometry Problem 929: Triangle, Orthocenter, Circumcircle, Reflection, Concurrency

Geometry Problem
Level: Mathematics Education, High School, Honors Geometry, College.

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Problem 733: Triangle, Orthocenter, Altitude, Reflection in a line, Circumcircle, Concurrency

Geometry Problem
Level: Mathematics Education, High School, Honors Geometry, College.

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