Nouns denoting two and three dimensional shapes
- symmetry
- balance among the parts of something
- tetrahedron
- any polyhedron having four plane faces
- angularity
- a shape having one or more sharp angles
- asymptote
- a straight line that is the limiting value of a curve; can be considered as tangent at infinity
- wave
- an undulating curve
- cylinder
- a surface generated by rotating a parallel line around a fixed line
- triangle
- a three-sided polygon
- pillar
- anything that approximates the shape of a column or tower
- equipoise
- equality of distribution
- parallelogram
- a quadrilateral whose opposite sides are both parallel and equal in length
- brachium
- (biology) a branching or armlike part of an animal
- true anomaly
- the angular distance of a point in an orbit past the point of periapsis measured in degrees
- hyperbola
- an open curve formed by a plane that cuts the base of a right circular cone
- spherical triangle
- a spherical polygon formed by the arcs of 3 great circles
- crotchet
- a sharp curve or crook; a shape resembling a hook
- camber
- a slight convexity (as of the surface of a road)
- secant
- a straight line that intersects a curve at two or more points
- prismatoid
- a polyhedron whose vertices all lie in one or the other of two parallel planes; the faces that lie in those planes are the bases of the prismatoid
- rhomboid
- a parallelogram with adjacent sides of unequal lengths; an oblique-angled parallelogram with only the opposite sides equal
- arc
- something curved in shape
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