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27 Cards in this Set

  • Front
  • Back
Opposing rays
Rays that go in opposite directions
Absolute value
How far apart two numbers are from each other (always positive)
Collineral points
Points all in one line
Coplanar points
Points all in one plane
Intersection of two figures
Set of points that are in both figures
Distance between the endpoints
Ruler Postulate
1. The points on a line can be paired with the real numbers in a way that any 2 points can have coordinates 0 and 1
2. The distance between any two points equals the absolute value of the diference of their coordinates
Segment Addition Postulate
If B is between A and C, then

AB + BC = AC
Congruent objects
Two objects that have the same size and shape
Midpoint of a segment
Point that divides the segment into two congruent segments
Bisector of a segment
Line, segment, ray, or plan that intersects the segment at its midpoint
Figure formed by two rays that have the same endpoint
Angle Addition Postulate
If point B lines in the interior of AOC, then

mAOB + mBOC = mAOC
Adjacent angles
Two angles that have a common vertex and a common side but not common interior points
Bisector of an angle
Ray that divides the angle into two congruent adjacent angles
Acute angle
Measure between 0 and 90
Right angle
Measure 90
Obtuse angle
Measure between 90 and 180
Straight angle
Measure 180
Postulate 5
A line contains at least two points; a plane contains at least three points not all in one line; space contains at least four points not all in one plane
Postulate 6
Through any two points there is exactly one line
Postulate 7
Through any three points there is at least one plane, and through any three noncollinear points there is exactly one plane
Postulate 8
If two points are in a plane, then the line that contains the points is in that plane
Postulate 9
If two planes intersect, then their intersection is a line
Theorem 1-1
If two lines intersect, then they intersend in exactly one point
Theorem 1-2
Through a line and a point notin the line there is exaclty one plane
Theorem 1-3
If two lines intersect, then exactly one plane contains the line