| Title |
Trikampio kampų kotangentų racionaliosios reikšmės / |
| Another Title |
A rational cotangents of the angles of a triangle. |
| Authors |
Mazėtis, Edmundas ; Melničenko, Grigorijus |
| DOI |
10.15388/LMR.B.2014.16 |
| Full Text |
|
| Is Part of |
Lietuvos matematikos rinkinys. Ser. B.. Vilnius : Vilniaus universiteto leidykla / Vilnius University Press. 2014, t. 55, p. 84-89.. ISSN 0132-2818. eISSN 2335-898X |
| Keywords [eng] |
Heronian triangles ; pseudo Heronian triangles ; integer lattice |
| Abstract [eng] |
We investigate how rational values cotangents angles of a triangle influence of its properties. The main result: cotangents of any two angles of a triangle are rational then, and only then, when a triangle similar to a triangle whose squares of sides are integer and twice the area is an integer. |
| Published |
Vilnius : Vilniaus universiteto leidykla / Vilnius University Press |
| Type |
Journal article |
| Language |
Lithuanian |
| Publication date |
2014 |
| CC license |
|
