2002
DOI: 10.2307/3621143
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Some new triples of integers and associated triangles

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Cited by 6 publications
(4 citation statements)
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“…All triangles with ZC = 2ZA have the associated quadratic equation c 2 = a 2 + ab, which can be seen by using the cosine rule on ZA and ZC and using the doubleangle rule cos2A = 2 cos 2 A -1. (Deshpande [4] also discusses integer triangles with ZC = 2ZA.) Since ZA < ZC we know a < c, so there are three cases: (i) b < a < c, (ii) a < c < b and (iii) a < b < c. The reader may wish to use the same method to confirm that there exist no triangles with integer sides in arithmetic progression and ZB = JT/3.…”
Section: The 3:4:5 Trianglesmentioning
confidence: 99%
“…All triangles with ZC = 2ZA have the associated quadratic equation c 2 = a 2 + ab, which can be seen by using the cosine rule on ZA and ZC and using the doubleangle rule cos2A = 2 cos 2 A -1. (Deshpande [4] also discusses integer triangles with ZC = 2ZA.) Since ZA < ZC we know a < c, so there are three cases: (i) b < a < c, (ii) a < c < b and (iii) a < b < c. The reader may wish to use the same method to confirm that there exist no triangles with integer sides in arithmetic progression and ZB = JT/3.…”
Section: The 3:4:5 Trianglesmentioning
confidence: 99%
“…In this note, I present an alternative, equivalent trigonometric solution for the case of three real roots. To my knowledge this is the first solution that is specifically based on a triangle: specifically, a triangle with angles A, B such that B = 2A (also considered in an integer context by Deshpande [2]). In (1) let…”
Section: Solving Cubics By Solving Trianglesmentioning
confidence: 99%
“…Later Oppenheim, together with Daykin, explicitly characterized primitive integer triples for all p : q families, it seems fair to call them the Oppenheim triples. Their result was published back in 1967 [6], but special cases and related results were rediscovered later multiple times, see [2,3,7,11,13,15,16,17,21,24]. However, almost all attention went to the Oppenheim triples, while the "Pythagorean theorems", and algebro-geometric connections, were largely overlooked.…”
Section: Introductionmentioning
confidence: 99%