Nouns denoting two and three dimensional shapes

reflex angle
an angle greater than 180 degrees (but less than 360)
 
leaf shape
any of the various shape that leaves of plants can assume
 
acute angle
an angle less than 90 degrees but more than 0 degrees
 
convex polygon
a polygon such that no side extended cuts any other side or vertex; it can be cut by a straight line in at most two points
 
orbital plane
(astronomy) the plane on which a body is orbiting
 
convex polyhedron
a polyhedron any plane section of which is a convex polygon
 
element of a cylinder
a straight line running the length of the cylinder
 
connection
a connecting shape
 
nonagon
a nine-sided polygon
 
point
a very small circular shape
 
sag
a shape that sags
 
curve
the trace of a point whose direction of motion changes
 
oblique angle
an angle that is not a right angle or a multiple of a right angle
 
ray
(mathematics) a straight line extending from a point
 
diagonal
(geometry) a straight line connecting any two vertices of a polygon that are not adjacent
 
oblique triangle
a triangle that contains no right angle
 
bifurcation
a bifurcating branch (one or both of them)
 
ovoid
an egg-shaped object
 
sector
a plane figure bounded by two radii and the included arc of a circle
 
plane
(mathematics) an unbounded two-dimensional shape
 
  List More