types:
solid
a three-dimensional shape
plane,
sheet
(mathematics) an unbounded two-dimensional shape
figure
a combination of points and lines and planes that form a visible palpable shape
line
a length (straight or curved) without breadth or thickness; the trace of a moving point
round shape
a shape that is curved and without sharp angles
circle
something approximating the shape of a circle
square
something approximating the shape of a square
triangle
something approximating the shape of a triangle
plume
anything that resembles a feather in shape or lightness
curve
a line on a graph representing data
Cartesian plane
a plane in which all points can be described in Cartesian coordinates
facet plane
the plane of a facet of an object (as of a cube)
picture plane
the plane that is in the foreground of a drawing or painting; coextensive with but different from the objective surface of the work
tangent plane
the plane that contains all the lines tangent to a specific point on a surface
pencil
a figure formed by a set of straight lines or light rays meeting at a point
subfigure
a figure that is a part of another figure
bulb
anything with a round shape resembling a teardrop
cylinder
a solid bounded by a cylindrical surface and two parallel planes (the bases)
straight line
a line traced by a point traveling in a constant direction; a line of zero curvature
geodesic,
geodesic line
(mathematics) the shortest line between two points on a surface, such as a straight line on a plane or an arc of a great circle on a sphere