math properties of equality & AAP, SAP
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reflexive property
a=a
transitive property
a=b and b=c, then a=c
Division property
a=b and c eual sign with an line thorough it 0, then a/c = b/c
Addition property
a=b and c=d, then a+c = b+d
Subtraction property
a=b and c=d, then a-c = b-d
Multiplication property
a=b then ca=cb
symmetric property
a=b, then b=a
Substitution property
a=b, then either a or b may be substituted for the other in any inequality
SAP segment addition postulate
if B is between A and C, then AB+BC= AC
AAP angle addition postulate
m<AOB + m<BOC= m<AOC
