Who was the 5 famous geometricians?

Five famous geometricians include Euclid, known for his work on geometry in ancient Greece; Pythagoras, who developed the Pythagorean theorem; Apollonius of Perga, known for his work on conic sections; Rene Descartes, who developed Cartesian geometry; and Carl Friedrich Gauss, who made significant contributions to many areas of mathematics, including geometry.