

Geometry:
Orthocenter of a triangle, Theorems and Problems 
Index 12




Proposed Problem 134. Orthic
Triangle, Altitudes, Angle Bisectors, Orthocenter, Incenter. 

Proposed Problem 132. Triangle,
60 degree, Orthocenter, Congruence, Midpoint. 

Proposed Problem 79: Triangle.
Similarity, Altitudes, Orthocenter, Incircles, Inradii. 

Problem 37. Right triangle, altitude, incircles, incenters, and
orthocenter. 

Problem 21.
Acute triangle, orthocenter, diameter, tangents.

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Antonio Gutierrez






