# Nouns denoting two and three dimensional shapes

- prismoid
- a prismatoid whose bases are polygons having the same number of sides and whose other faces are trapezoids or parallelograms

- bead
- a shape that is spherical and small

- bound
- a line determining the limits of an area

- isosceles triangle
- a triangle with two equal sides

- excrescence
- something that bulges out or is protuberant or projects from its surroundings

- triangle
- something approximating the shape of a triangle

- Platonic solid
- any one of five solids whose faces are congruent regular polygons and whose polyhedral angles are all congruent

- parallelogram
- a quadrilateral whose opposite sides are both parallel and equal in length

- belly
- a part that bulges deeply

- distorted shape
- a shape resulting from distortion

- equiangular triangle
- a three-sided regular polygon

- angle of refraction
- the angle between a refracted ray and a line perpendicular to the surface between the two media at the point of refraction

- pouch
- an enclosed space

- facet
- a smooth surface (as of a bone or cut gemstone)

- corrugation
- a ridge on a corrugated surface

- rectangle
- a parallelogram with four right angles

- line
- a slight depression or fold in the smoothness of a surface

- conic section
- (geometry) a curve generated by the intersection of a plane and a circular cone

- bulb
- anything with a round shape resembling a teardrop

- convex shape
- a shape that curves or bulges outward

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