An explanation of how a point corresponds to one number on a ruler, the Ruler Postulate, the distance between any two points is the absolute value of the difference of the coordinates, finding the length of a segment, congruent segments and tick marks, using a compass and straight edge to construct a congruent segment, the Segment Addition Postulate, midpoints, bisectors, how a segment bisector divides a segment in half at the midpoint, using midpoints to find length, and collinearity.
JoAnn's School High School Geometry
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