The following topics are immediate subtopics of Geometry.

Term: Axis
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 Definition: (ofa c lind ) th lin Y er, e e segment : connecting the centers of the bases

Term: Center Of Curvature
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 Definition: the center of the circle whose center lies on the concave side of a curve on the normal to a given point of the curve and whose radius is equal to the radius of curvature at that point.

Term: Concave
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 Definition: Of a surface, curving inwards, or away from the eye. For example, a bowl appears concave when viewed from above. In geometry, a concave polygon is one that has an interior angle greater than 180 de...

Term: Concurrent
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 Definition: Having a common point. Concurrent lines, for example, are lines that all pass through a certain point.

Term: Convex
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 Definition: Of a surface, curving outwards, or towards the eye. For example, the outer surface of a ball appears convex. In geometry, the term is used to describe any polygon possessing no interior angle great...

Term: Coordinates
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 Last modified: over 9 years ago
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 Definition: Any of a set of two or more numbers used to determine the position of a point, line, curve, or plane in a space of a given dimension with respect to a system of lines or other fixed references.

Term: Diagonal
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 Definition: a lin e segment connecting two : nonconsecutive vertices of a I : polygon or polyhedron.

Term: Focal Point
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 Definition: 1. Also called: principal focus, focus. the point on the axis of a lens or mirror to which parallel rays of light converge or from which they appear to diverge after refraction or reflection. 2. a...

Term: Horizontal
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 Definition: having the same direction as the horizon, flat and level. A marble would not roll off a horizontal table without being pushed. On paper, a horizontal line is shown by a line parallel to the top of ...

Term: Line
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 Last modified: over 5 years ago
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 Definition: an undefined term in most deductive systems. A straight arrangement of infinitely many points. A line has no thickness and is therefore considered onedimensional.