a straight line that joins two points on the circumference of a circle or the ends of an arc
arched, rounded line or object
a line of which no part is straight, e.g. part of the edge of a circle
arched, rounded line or object
a curve of two equal parts formed by cutting through both bases of a double cone
arched, rounded line or object
a flat curve formed by cutting a cone along a line parallel to its side
arched, rounded line or object