3.4 Proving Lines ll

# 3.4 Proving Lines ll - then l m 1 2 l m Thm 3.10 – Alt...

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3.4 Proving Lines  p. 150

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Post. 16 – Corresponding s Converse If 2 lines are cut by a transversal so that corresponding s are 2245 , then the lines are  . ** If 1 2245 2, then l  m. l m 1 2
Thm. 3.8 – Alt. Int. s Converse If 2 lines are cut by a transversal so that alt. int. s are 2245 , then the lines are  . ** If 1 2245 2, then l  m. 1 2 l m

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Thm. 3.9 – Consecutive Int. s Converse If 2 lines are cut by a transversal so that consecutive int. s are supplementary, then the lines are  . ** If 1 & 2 are supplementary,

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Unformatted text preview: then l m. 1 2 l m Thm 3.10 – Alt. Ext. ∠ s Converse • If 2 lines are cut by a transversal so that alt. ext. ∠ s are 2245 , then the lines are . ** If ∠ 1 2245 ∠ 2, then l m. l m 1 2 Ex : Based on the info in the diagram, is p q ? If so, give a reason. Yes, alt. ext. ∠ s conv. No No p q p q p q Ex: Find the value of x that makes j k . The angles marked are consecutive interior ∠ s. Therefore, they are supplementary. x + 3x = 180 4x = 180 x = 45 j k x o 3x Assignment Assignment...
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