Results 121 to 130 of about 46,285 (150)

106.28 Inequalities involving the inradius and altitudes of a triangle

The Mathematical Gazette, 2022
Nguyen Xuan Tho
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104.07 An inequality for the altitudes of the excentral triangle

The Mathematical Gazette, 2020
Martin Lukarevski
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Celestial Navigation—Spherical Trigonometry, Spherical Triangles, Azimuth, Sextant Altitude, Amplitude, and Line of Position

, 2017
George A. Maul
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Proof Without Words: Rapid Construction of Altitudes of Triangles

Mathematics Magazine, 2014
Larry Hoehn
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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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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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Concurrency of the altitudes of a triangle

Mathematische Semesterberichte, 2013
This paper presents several different proofs of the fact that the altitudes of a triangle are concurrent. Remarkably 12 proofs are given, using ideas ranging from the simple use of similarity to the use of coordinates. The paper is closed with some remarks that might show ideas to be pursued by a reader that might lead him to more complicated settings.
Hajja, Mowaffaq, Martini, Horst
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The Altitudes of a Triangle and of a Tetrahedron

The American Mathematical Monthly, 1945
Victor Thébault
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Some Inequalities for Altitudes and Other Elements of Triangle

, 1998
In this paper we give some improvements of geometric inequalities from the recent monograph [1].
Mališa Žižović, Milorad Stevanović
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