Thực đơn
Parabol Chú thích|month=
bị phản đối (trợ giúp)Thực đơn
Parabol Chú thíchLiên quan
Parabol Parabole (bướm đêm) Parabonna goffergei Parasola Parasol Henbē Parabel'sky (huyện) Paracolax tristalis Paradolichurus obidensis Paraboea changjiangensis ParablaxTài liệu tham khảo
WikiPedia: Parabol http://www.geocities.com/Area51/Quadrant/3864/sket... http://www.geocities.com/Area51/Quadrant/3864/sket... http://www.mathwarehouse.com/quadratic/parabola/in... http://mathworld.wolfram.com/Parabola.html http://math.fullerton.edu/mathews/n2003/TangentPar... http://www.mste.uiuc.edu/dildine/sketches/parabola... http://web.archive.org/web/20060212072618/http://m... http://web.archive.org/web/20070625162103/http://m... http://www.cut-the-knot.org/Curriculum/Geometry/Ar... http://www.cut-the-knot.org/Curriculum/Geometry/Pa...