==Parametric curves==A parameterized curve in "R"2 is defined as the image of a function "g":R→R2, "g"("t") = ("g"1("t"),"g"2("t")).
Параметрическая кривая в "R"2 определяется как образ функции "g": R → R2, "g"("t") = ("g"1("t"), "g"2("t")).