Nouns denoting two and three dimensional shapes

element of a cone
a straight line joining the apex and a point on the base
 
prism
a polyhedron with two congruent and parallel faces (the bases) and whose lateral faces are parallelograms
 
cylinder
a surface generated by rotating a parallel line around a fixed line
 
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
 
proportion
balance among the parts of something
 
droop
a shape that sags
 
pellet
a small sphere
 
quadrate
a square-shaped object
 
perversion
a curve that reverses the direction of something
 
camber
a slight convexity (as of the surface of a road)
 
cladogram
a tree diagram used to illustrate phylogenetic relationships
 
natural shape
a shape created by natural forces; not man-made
 
right angle
the 90 degree angle between two perpendicular lines
 
oval
a closed plane curve resulting from the intersection of a circular cone and a plane cutting completely through it
 
oblique angle
an angle that is not a right angle or a multiple of a right angle
 
critical angle
the smallest angle of incidence for which light is totally reflected
 
view angle
the angle included by a photographic lens
 
octagon
an eight-sided polygon
 
knife
any long thin projection that is transient
 
altitude
the perpendicular distance from the base of a geometric figure to the opposite vertex (or side if parallel)
 
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