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3.2 Proof & Perp. lines

3.2 Proof & Perp. lines - 3.2 Proof Lines p 136 3...

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3.2 Proof & 3.2 Proof & Lines Lines p. 136 p. 136
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3 kinds of proofs 3 kinds of proofs 2 column proof Paragraph proof Flow proof – graphic organizer using boxes & arrows to show a logical order
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2-column proof of 2-column proof of the Vertical <s theorem the Vertical <s theorem Statements 1. <1 & <2 are a linear pr. <2 & <3 are a linear pr. 1. <1 & <2 are supp. <2 & <3 are supp. 3. <1 2245 <3 Reasons 1. Given 1. Linear pr. Post. 1. 2245 supps. Thm.
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Paragraph proof of Paragraph proof of the vertical <s theorem the vertical <s theorem We are given that <1 & <2 are a linear pair & <2 & <3 are a linear pair. By the Linear Pair Postulate, we know that <1 & <2 are supplementary & <2 & <3 are supplementary. So, by the congruent supplements theorem, <1 2245 <3.
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Flow proof of Flow proof of the vertical <s theorem the vertical <s theorem <1 & <2 are a linear pair <2 & <3 are a linear pair Given Given <1 & <2 are supplementary <2 & <3 are supplementary Linear Pair Postulate Linear Pair Postulate <1 2245 <3 2245 supplements theorem
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If 2 lines intersect to form a linear pair of 2245 <s, then the lines are . →if <1
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