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Concurrency of the altitudes of a triangle

Mathematische Semesterberichte, 2013
Of all the traditional (or Greek) centers of a triangle, the orthocenter (i.e., the point of concurrence of the altitudes) is probably the one that attracted the most of attention. This may be due to the fact that it is the only one that has no exact analogue for arbitrary higher dimensional simplices, for spherical and hyperbolic triangles, or for ...
Horst Martini, Mowaffaq Hajja
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Lobachevsky triangle altitudes theorem as the Jacobi identity in the Lie algebra of quadratic forms on symplectic plane

Journal of Geometry and Physics, 2005
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Vladimir I. Arnold
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The Altitudes of a Triangle and of a Tetrahedron

The American Mathematical Monthly, 1945
Victor Thébault
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Triangles Formed by Line Segments Parallel to the Altitudes and Angle Bisectors of a Triangle

The American Mathematical Monthly, 1960
Jack M. Elkin
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On the Altitudes of the Triangle and of the Tetrahedron

The American Mathematical Monthly, 1948
Victor Thébault
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2997. Relations between the portions of the altitudes of a plane triangle

The Mathematical Gazette, 1962
John Satterly
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104.35 Proof without Words: A right triangle ABC with altitude AH = BC

The Mathematical Gazette, 2020
Victor Oxman, Moshe Stupel
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Global Peak Detection with Novel PV Curve Triangle for Partially Shaded PV Modules

2023 Middle East and North Africa Solar Conference (MENA-SC), 2023
The Photovoltaic (PV) panel placed on the roof is frequently subjected to partial shading conditions and exhibits several multiple peaks in the $P-V$ characteristics. Initially identify the maximum power peak to track Global Maximum Power Point (GMPP) in
Linta Eliya Mathew, Ashish K Panchal
semanticscholar   +1 more source

73.55 To show that the altitudes of a triangle are concurrent

The Mathematical Gazette, 1989
A. C. Norris
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Examining The Efforts of Middle School 7th Grade Students To Draw Altitude In Parallelogram And Triangle

, 2021
The aim of this research is to examine the efforts of 7th grade students to draw altitude in parallelograms and triangles. Moreover, it is to reveal the difficulties students experience in drawing altitude. For this purpose, a case study from qualitative research methods was managed.
ŞENGÜN, Kazım Çağlar, YILMAZ, Süha
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