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the points on a line can be paired with all real numbers and the distance on the line is found by taking the absolute value of the difference of their coordinates.
Segment Addition Postulate
If B is between A and C, then AB + BC = AC. If AB + BC = AC, then B is between A and C.
Given a strait angle rays can be paired with numbers from 0 to 180. the measure of an angle is the absolute value of the difference of the numbers paired with rays.
A line contains at least 2 points, a plane at least 3 non collinear points, and space at least 4 non coplanar points.
7, Any 3 points are contained in at least one plane, and 3 non-collinear points determine a plane.
flat plane postulate
if two points lie in a plane, then the line containing those points lies in the plane
Angle Bisector theorem
If a point is on the bisector of an angle, then it is equidistant from the two sides of the angle
if the outside rays of two adjacent acute angles are perpendiculalr, then the angles are complementary.
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