Download - Lesson 1-5 I can identify and use special pairs of angles I can identify perpendicular lines
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Lesson 1-5
• I can identify and use special pairs of angles
• I can identify perpendicular lines
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2 angles with a sum of 90°
2 angles with a sum of 180°
40°
50°
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2 angles that share a vertex and side
2 adjacent angles that make a line
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2 non-adjacent angles formed by intersecting lines
12
34
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adjacent
adjacent, linear pair
vertical
adjacent
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adjacent
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supplementary, adjacent and linear pair
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complementary
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lines that intersect to form right angles
A
B
X
Y┴AB XY
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9x + 5 + 3x + 1 = 90
12x + 6 = 9012x = 84
x = 7
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3x + 10 x
25
x + 3x + 10 = 90
4x + 10 = 904x = 80 x = 20
20
70
2070
65
65
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x
2x + 21x + 2x + 21 = 90
3x + 21 = 903x = 69 x = 23
23
67
23° and 67°
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ASSIGNMENT:Lesson 1-5 worksheetSkip #8, 9, 10, and 13
Quiz on Wednesday (1-4 and 1-5)Test on FRIDAY!