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Geometry Section 1.2
Segments and Congruence, Larson Geometry 2008
9
Mathematics
10th Grade
08/19/2009

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Term
Definitions
Definition
Description of terms based on the Undefined Terms. eg. Line Segment, based on the def. of a line.
Term
Postulates
Definition
AKA Axioms. Rules accepted to be true without proof. eg. Ruler Postulate.
Term
Theorems
Definition
A rule that can be proved based on logic, postulates, and definitions.
Term
Ruler Postulate
Definition
The points on a number line can be matched one-to-one with the real numbers.
Term
Real Number System
Definition
The set of ALL numbers from negative infinity to infinity.
Term
Distance
Definition
The distance between two points A and B is denoted by AB (no line on top) and is the value of the difference between the coordinates of A and B.
Term
AB
Definition
The length of the segment AB.
Term
Segment Addition Postulate
Definition
If B is between A and C, then AB + BC = AC. ALSO... If AB + BC = AC, then B is between A and C. (goes both ways)

Whole = sum of parts
Term
Congruent Segments
Definition
Segments that have the same length. "Equal LENGTH" implies "congruent SEGMENTS."
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