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20 Cards in this Set

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