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19 Cards in this Set
- Front
- Back
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point
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exact location in space
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line
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straight path that extends without end in opposite directions
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ray
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part of a line it has one endpoint and extends without end in one direction
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line segment
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part of a line or ray that extends from one endpoint to another
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plane
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a perfectly flat surface that extends infinitely in all directions
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congruent
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figures are congruent if they have the same shape and size
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angle
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an angle is formed by two rays with a common endpoint
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vertex
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the common endpoint on an angle
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right angle
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an angle that makes exactly 90
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acute angle
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an angle that measures less than 90
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obtuse angle
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an angle that measures more than 90 but less than 180
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straight angle
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an angle that measures exactly 180
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complementary angle
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the sum of the measures of two angles is 90
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supplementary angles
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the sum of the measures of the two angles is 180
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perpendicular lines
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lines that intersect to form right angles
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parallel lines
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lines in the same plane that do not intersect
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skew lines
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lines that lie in differnet planes that are neither parallel nor intersecting
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vertical angles
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a pair of opposite congrueent angles formed by intersecting lines
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transversal
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a line that intersects two or more lines
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