Some Activities in the Style of "Proof without Words” Related to Altitudes in a Triangle

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Victor Oxman
Moshe Stupel


In this article, the authors present some activities in the style of "proof without words” related to altitudes in a triangle. The activity is useful for teachers and students of geometry. Such activities may develop different ways of thinking for students, which may yield unexpected, short, and beautiful solutions that indicate the great wealth of mathematics.

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