Nouns denoting two and three dimensional shapes
- equilateral
- a figure whose sides are all equal
- hypotenuse
- the side of a right triangle opposite the right angle
- cylinder
- a solid bounded by a cylindrical surface and two parallel planes (the bases)
- geodesic
- (mathematics) the shortest line between two points on a mathematically defined surface (as a straight line on a plane or an arc of a great circle on a sphere)
- ellipsoid
- a surface whose plane sections are all ellipses or circles
- perversion
- a curve that reverses the direction of something
- cardioid
- an epicycloid in which the rolling circle equals the fixed circle
- angularity
- a shape having one or more sharp angles
- recess
- a small concavity
- isosceles triangle
- a triangle with two equal sides
- block
- a three-dimensional shape with six square or rectangular sides
- sphere
- a three-dimensional closed surface such that every point on the surface is equidistant from the center
- angular distance
- the angular separation between two objects as perceived by an observer
- exterior angle
- the supplement of an interior angle of a polygon
- wedge
- any shape that is triangular in cross section
- spherule
- a small sphere
- incisure
- (anatomy) a notch or small hollow
- frustum
- a truncated cone or pyramid; the part that is left when a cone or pyramid is cut by a plane parallel to the base and the apical part is removed
- ridge
- any long raised strip
- secant
- a straight line that intersects a curve at two or more points
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