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# Geometry Vocab

TermDefinition
Congruent Segments Segments with the same length.
Midpoint The point that divides a segment in two congruent halves.
Segment Bisector A line, ray, or segment that intersects a segment at its midpoint.
Perpendicular Bisector A line, ray, or segment that is perpendicular to a segment at its midpoint.
Ruler Postulate The distance between points A and B, written as AB, is the absolute value of the distance between coordinates of A and B.
Midpoint Theorem If M is the midpoint of XY, then XM = 1/2 XY and MY = 1/2 XY.
Segment Addition Postulate If B is between A and C, the AB + BC = AC. If AB + BC = AC, them B is between A and C.
Midpoint Formula For any two points (X1, Y1)and (X2, Y2), the coordinates of the midpoint can be found using the formula 1/2(X1 + X2), 1/2(Y1 + Y2)
Created by: Christine Koenig