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# Geometry

### Vocabulary

Reflexive Property A quantity is congruent (equal) to itself. a=a
Symmetric Property If a=b, then b=a
Transitive Property If a=b and b=c, then a=c
Addition Postulate If equal quantities are added to qual quantities, the sums are equal.
Subtraction Postulate If equal quantities are subtracted from equal quantities, the differences are equal.
Multiplication Postulate If equal quantities are multiplied by equal quantities, the products are equal. (also Doubles of equal quantities are equal)
Division Postulate If equal quantities are divided by equal nonzero quantities, the quotients are equal. (also Halves of equal quantities are equal)
Substitution Postulate A quantity may be substituted for its equal in any expression.
Partition Postulate The whole is equal to the sum of its parts. Also: Betweeness of Points: AB + BC = AC Angle Addition Postulate: m < ABC + m<CBD = m<ABD
Construction Two points determine a straight line.
Created by: jorgeho2001