Back بيضاوي ديكارتي Arabic Овал на Декарт Bulgarian Óvalo cartesiano Spanish Kartesiar obalo Basque Ovale de Descartes French Descartesov oval Croatian Oval Cartesius ID Owal Kartezjusza Polish Oval cartesiana Portuguese Овал Декарта Russian
In geometry, a Cartesian oval is a plane curve consisting of points that have the same linear combination of distances from two fixed points (foci). These curves are named after French mathematician René Descartes, who used them in optics.