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PROOFS 

PROOFS . I will successfully write a two-column proof!!!!. Statements / Steps. Justification / Reasons. Always start with the Given. The justification will be a: Theorem Postulate Definition Property. Your last statement will always be what you are “proving.”.

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PROOFS 

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  1. PROOFS  I will successfully write a two-column proof!!!!

  2. Statements / Steps Justification / Reasons Always start with the Given • The justification will be a: • Theorem • Postulate • Definition • Property Your last statement will always be what you are “proving.”

  3. We will be using all of the Properties of Equality

  4. Properties apply to congruency as well…

  5. Equality vs. Congruency Congruency • When referring to the actual structure (i.e. ABC & FG) • Whenever you use Properties of Congruency Equality • When using measure/lengths (i.e. m ABC & FG) • Whenever you need NUMBERS • If you add, subtract, multiply, divide • Whenever you use Properties of Equality

  6. Proof Worksheet #2 Statements Justifications • O is the midpoint of MN • OM = OW 1. Given 2. 2. Def. of Midpoint 3. NO = OM 3. Def. of Congruent 4. NO = OW • Transitive P. of E. or Substitution P. of E. • (Steps 1 & 3)

  7. Homework: • Proofs Worksheet #2 (3 and 4)

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