@article {MATHEDUC.05694773,
author = {Persson, Ulf},
title = {Triangles with given inscribed and circumscribed circles. (Trianglar med givna omskrivna och inskrivna cirklar.)},
year = {2009},
journal = {Normat},
volume = {57},
number = {3},
issn = {0801-3500},
pages = {129-140},
publisher = {Nationellt Centrum f\"or Matematikutbildning (NCM), G\"oteborgs Universitet, G\"oteborg},
abstract = {Summary: This is a second article [for a review of the first one see ibid. 57, No. 1, 10--21 (2009; Zbl 1188.51007; ME 2009f.00485)] in a series of three, concerning 1-dimensional families of triangles. In this case those with given circumscribed and inscribed radii $R,r$ are presented. The construction of such families is a special case of Poncelet's theorem, exploiting the approach via elliptic curves, initiated by Jacobi.},
msc2010 = {G90xx (G50xx G70xx)},
identifier = {2010b.00476},
}