Nouns denoting two and three dimensional shapes
- angle of attack
- the acute angle between the direction of the undisturbed relative wind and the chord of an airfoil
- chap
- a long narrow depression in a surface
- forking
- the place where something divides into branches
- pyramid
- a polyhedron having a polygonal base and triangular sides with a common vertex
- pore
- any tiny hole admitting passage of a liquid (fluid or gas)
- S-shape
- a double curve resembling the letter S
- trapezohedron
- a polyhedron whose faces are trapeziums
- cube
- a three-dimensional shape with six square or rectangular sides
- quadrilateral
- a four-sided polygon
- hypotenuse
- the side of a right triangle opposite the right angle
- notch
- a V-shaped indentation
- spherical polygon
- a figure on the surface of a sphere bounded by arcs of 3 or more great circles
- tree diagram
- a figure that branches from a single root
- hexahedron
- any polyhedron having six plane faces
- spiral
- a curve that lies on the surface of a cylinder or cone and cuts the element at a constant angle
- bifurcation
- a bifurcating branch (one or both of them)
- diameter
- a straight line connecting the center of a circle with two points on its perimeter (or the center of a sphere with two points on its surface)
- bight
- a bend or curve (especially in a coastline)
- jog
- a sharp change in direction
- regular icosahedron
- an icosahedron with twenty equilateral triangles as faces
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