Perpendicular Lines SECTION 2.5.

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Presentation transcript:

Perpendicular Lines SECTION 2.5

Definition Perpendicular lines are two lines that intersect to form right angles (90o).

l n

Perpendicular THEOREM Perpendicular lines form adjacent angles.

2x + 10 + x – 7 = 90o 3x + 3 = 90o 3x = 87o x = 29o 2x + 10 x – 7 DRAW THIS FIRST 2x + 10

9x – 18 + 2x = 180o 11x – 18 = 180o 11x = 198o x = 18o DRAW THIS FIRST 9x – 18 2x

Name the theorem or state the definition that justifies the statement below. Definition of ⏊ ⏊ Theorem ⏊ Theorem

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PRACTICE PROBLEMS PAGE 57 Classroom Exercises #2-11 Line Song