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20 Cards in this Set
- Front
- Back
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segment addition postulate
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if B is between A and C then
AB+BC=AC |
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congruent segment
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two or more segments of equal length
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midpoint of a segment
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the point that divides the segment into two congruent segments
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bisector of a segment
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a line, segment, ray, or plane that intersects the segment at its midpoint
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angle
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the figure formed by two rays that have the same endpoint
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congruent angles
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two or more angles that have equal measures
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angle addition postulate
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m<ECA+m<ACB=M<ECB
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angle bisector
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a ray that divides an angle into two congruent adjacent angles
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adjacent angles
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two angles in a plane that share a common vertex and a common side but no common interior points
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complimentary angles
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two angles with measures that total 90
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supplementary angles
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two angles with measures that total 180
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vertical angles
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two angles such that the sides of one angle are opposite rays to the sides of the other angle
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linear pair
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two adjacent angles such that their unshared sides are opposite rays
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postulate
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a line contains at least two points
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postulate
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through any two points there is exactly one line
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theorem
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if two lines intersect then they intersect in exactly one point
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postulate
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a plane contains at least 3 noncollinear points
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postulate
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through any three noncollinear points there is exactly one plane
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postulate
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if two points are in a plane then the line that contains the points is in that plane
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postulate
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if two planes intersect then their intersection is a line
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