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18 Cards in this Set
- Front
- Back
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a location that has no size; named by a capital letter
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point
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defined as the set of all points
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space
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a series of points that extends in two opposite directions without end; named by any two points or with a single lowercase letter
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line
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on the same line
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collinear
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a flat surface that has no thickness; named by either a single capital letter or by at least three of its noncollinear points
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plane
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points and lines in the same plane
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coplanar
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an accepted statement of fact
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postulate (axiom)
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through any two points there is:
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exactly one line
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if two lines intersect, then they intersect in:
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exactly one point
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if two planes intersect, then they intersect in:
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exactly one line
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through any three noncollinear points ther is:
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exactly one plane
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the part of a line consisting of two endpoints and all points between them; named by endpoints
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segment
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the part of a line consisting of one endpoint and all the points of the line on one side of the endpoint; named by the endpoint and another point
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ray
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lines that do not intersect
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parallel lines
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lines that do not intersect but are noncoplanar
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skew lines
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measure of angle is greater than 0 but less than 90
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acute angle
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measure of angle equals 90
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right angle
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measure of angle is greater than 90 but less than 180
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obtuse
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