Monday, March 19, 2012

28th February, 2012: What is a mathematical statement?

A mathematical statement is a statement that can be judged to be true or false.

There are three types of mathematical statements:
A conditional: The most frequently used statement in the construction of an argument or in the study of mathematics.
Ex: If the two angles are congruent, then the two angles are both right angles.

An inversea conditional statement is formed by negating the hypothesis and negating the conclusion of the original statement. [Regents Prep]
Ex: If the two angles are not congruent, then the two angles are not right angles.

A contrapositive: Negating and switching the hypothesis and conclusion.
Ex: (Normal sentence): If Lisa sells her house, then her income did not stay the same.
Contrapositive: If Lisa's income stays the same, the she will not sell her house.

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