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when a conditional and its converse are true, you can combine them as a true statement; an if and only if.
logical reasoning; the process of reasoning logically from given statements to a conclusion
Law of Syllogism
allows you to state a conclusion from two true conditional statements when the conclusion of one conditional statement is the hypothesis of the other statement.
if a=b and b=c, then a=c/ if a is congruent to b and b is congruent to c, then a is congruent to c
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