Results 131 to 140 of about 46,285 (150)

Measuring the Speed and Altitude of an Aircraft Using Similar Triangles

SIAM Review, 1991
In this note a simple and sometimes practical method is devised with which the average speed and the cruising altitude of an aircraft in flight can be computed from a window seat inside the aircraft. No knowledge of the mechanical structure of the vehicle is assumed.
Hassan Sedaghat
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Integer Sided Triangles Whose Ratio of Altitude to Base is an Integer

, 1993
For centuries, mathematicians have been fascinated by the special properties associated with right, acute and obtuse triangles and yet new results continue to arise. See references [1] to [6]. The purpose of this article is twofold. We shall first present some additional interesting facts about triangles.
Charles K. Cook, Gerald E. Bergum
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Triangles from sums of altitudes and sides

Far East Journal of Mathematical Sciences, 1998
We improve the result by Vajaitu which says that sums of sides and corresponding altitude of a triangle are always sides of a triangle.
Čerin, Zvonko, Gianella, Gian Mario
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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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Lobachevsky triangle altitudes theorem as the Jacobi identity in the Lie algebra of quadratic forms on symplectic plane

Journal of Geometry and Physics, 2004
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Vladimir I. Arnold
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Preservice Primary Teachers' Understanding of the Concept of Altitude of a Triangle

Journal of Mathematics Teacher Education, 1999
The way teachers understand mathematics strongly influences their teaching and what their pupils learn. Using Vinner's model of acquisition of mathematical concepts with its distinction of concept image and concept definition as a framework, we analyze concept images, difficulties, and errors related to the concept of altitude of a triangle exhibited ...
Ángel Gutiérrez, Adela Jaime
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Tips For Beginners: Altitudes, medians, angle bisectors, and perpendicular bisectors of the sides of triangles

The Mathematics Teacher, 1963
Students have some difficulty with the concepts and constructions of the altitudes, the perpendicular bisectors of the sides, the medians, and the angle bisectors of the triangle. Some students seem to show little understanding of the words of the definitions, and the mechanics of straightedge and compass construction often do not help to clarify their
Harry Schor
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An Interesting Geometric Conservation Property of an Altitude in One Triangle Whose Continuation is Always a Medina, in a Triangle with a Common Vertex

International Journal for Technology in Mathematics Education
Throughout the years of the history of the development of mathematics, starting with the ancient mathematicians, new things were discovered from time to time, which made it a central component of the computerized world, which serves us in many fields, with the young "swimming" in it, and the adults asking: how could we live without it! Even these days,
Moshe Stupel, Yehuda Fisher
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Use of the Theory of Fischbein and the Theory of Shulman for the Study of Teachers’ Algorithmic Knowledge Concerning the Concept of the Altitude of a Triangle

2021
In this study I have used a theoretical framework integrating the theory of Fischbein and the theory of Shulman for examining the algorithmic knowledge of teachers. This framework has shaped the approach to both the formal and algorithmic aspects of knowledge, with reference to several components included in mathematical knowledge as well as ...
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73.55 To show that the altitudes of a triangle are concurrent

The Mathematical Gazette, 1989
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