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Perpendicular Lines SECTION 2.5.

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Presentation on theme: "Perpendicular Lines SECTION 2.5."— Presentation transcript:

1 Perpendicular Lines SECTION 2.5

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

3 l n

4 Perpendicular THEOREM
Perpendicular lines form adjacent angles.

5 2x + 10 + x – 7 = 90o 3x + 3 = 90o 3x = 87o x = 29o 2x + 10 x – 7
DRAW THIS FIRST 2x + 10

6 9x – x = 180o 11x – 18 = 180o 11x = 198o x = 18o DRAW THIS FIRST 9x – 18 2x

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

8 Now work! Written Exercises Page 58-59 #3 – 12, 18 – 25

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


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