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Published byRonald Hopkins Modified over 9 years ago
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3.3 Parallel and Perpendicular Lines To Relate Parallel and Perpendicular Lines
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Theorem 3.9
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Proof #1 l || k Given k|| m Given l || m Transitive Property
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Theorem 3-10
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Proof #2 r is perpendicular to t Given s is perpendicular to t Given m<1 = m< 2 = 90 Definition of Perpendicular Lines <1 ≅ < 2 Definition of Congruent Angles r ||sConverse of Corresponding Angles
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Theorem 3-11
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Proof #3 a is perp. to b Given b||c Given m<1 = 90 Definition of Perpendicular Lines <1 ≅ <2 Corresponding Angles m<2 = 90 Definition of Congruent Angles (Equal Measures) a is perp. to c Definition of Perpendicular Lines
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