Nouns denoting two and three dimensional shapes
- obtuse-angled triangle
- a triangle that contains an obtuse interior angle
- bulb
- anything with a round shape resembling a teardrop
- straight line
- a line traced by a point traveling in a constant direction; a line of zero curvature
- ray
- (mathematics) a straight line extending from a point
- convex shape
- a shape that curves or bulges outward
- tilt angle
- the angle a rocket makes with the vertical as it curves along its trajectory
- base
- the bottom side of a geometric figure from which the altitude can be constructed
- regular dodecahedron
- a dodecahedron with twelve regular pentagons as faces
- picture plane
- the plane that is in the foreground of a drawing or painting; coextensive with but different from the objective surface of the work
- triangle
- a three-sided polygon
- hypotenuse
- the side of a right triangle opposite the right angle
- projection
- any solid convex shape that juts out from something
- Platonic solid
- any one of five solids whose faces are congruent regular polygons and whose polyhedral angles are all congruent
- vertical angle
- either of two equal and opposite angles formed by the intersection of two straight lines
- angle of inclination
- (geometry) the angle formed by the x-axis and a given line (measured counterclockwise from the positive half of the x-axis)
- prolate cycloid
- a cycloid generated by a point outside the rolling circle
- concave polygon
- a polygon such that there is a straight line that cuts it in four or more points
- flank
- a subfigure consisting of a side of something
- bell shape
- the shape of a bell
- intrados
- the interior curve of an arch
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