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Definition
| an angle less than 90 degrees but more than 0 degrees |
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| an angle between 90 and 180 degrees |
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| each angular point of a polygon, polyhedron, or other figure |
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| a straight line from the center to the circumference of a circle or sphere |
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| straight line passing from side to side through the center of a body or figure |
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| the enclosing boundary of a curved geometric figure |
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| of or denoting circles, arcs, or other shapes that share the same center, the larger often completely surrounding the smaller. |
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| a straight line joining the ends of an arc. |
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| each of four quarters of a circle. |
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| the longest side of a right triangle, opposite the right angle. |
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| a three-sided regular polygon |
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| a triangle with no two sides of equal length |
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| a triangle with two equal sides |
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| a triangle with a right angle. |
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| a plane figure with four equal straight sides and four right angles. |
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| a plane figure with four straight sides and four right angles, esp. one with unequal adjacent sides, in contrast to a square. |
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| a quadrilateral with only one pair of parallel sides. |
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| a parallelogram with opposite equal acute angles, opposite equal obtuse angles, and four equal sides. |
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| a quadrilateral of which only the opposite sides and angles are equal. |
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| a plane figure with five straight sides and five angles. |
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| a plane figure with six straight sides and angles. |
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| a plane figure with eight straight sides and eight angles. |
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| a solid geometric figure whose two end faces are similar, equal, and parallel rectilinear figures, and whose sides are parallelograms. |
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| a solid geometric figure with straight parallel sides and a circular or oval section. |
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| a solid or hollow object that tapers from a circular or roughly circular base to a point. |
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| a round solid figure, or its surface, with every point on its surface equidistant from its center. |
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| a polyhedron of which one face is a polygon of any number of sides, and the other faces are triangles with a common vertex. |
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| a surface or solid formed by rotating a closed curve, esp. a circle, around a line that lies in the same plane but does not intersect it |
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| draw (a figure) around another, touching it at points but not cutting it. |
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| draw (a figure) within another so that their boundaries touch but do not intersect. |
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| a straight line or plane that touches a curve or curved surface at a point, but if extended does not cross it at that point. |
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| side by side and having the same distance continuously between them. |
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Definition
| at an angle of 90° to a given line, plane, or surface. |
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