1.6 Measuring Angles - Poudre School...
Transcript of 1.6 Measuring Angles - Poudre School...
1.6 Measuring Angles
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1-6 M
easurin
g Angl
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ObjectivesFind the measure of angles.Identify special angle pairs.
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acute angle0<x<90
xo xo xo
xo
right anglex=90
obtuse angle90<x<180
straight anglex=180
Name each angle.
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Angles that have the same measure are called CONGRUENT ANGLES.
The symbol you use is this: ≅
1 2
m 1 ≅ m 2
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Turn to p. 38 in your textbook.Read the Angle Addition Postulate.
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Angle Pairs
12
34
56
Vertical Angles
1 = 32 = 4
Adjacent Angles
Angles 5 and 6 are NEXT TO each other.
They share a side.
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More Angle Pairs
Complementary Angles Supplementary Angles
12 3 4
1 + 2 = 900 3 + 4 = 1800
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1 23
45
Name the following angles:
complementary
supplementary
vertical
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HOMEWORK
p. 40 #1 8, 13 23, 42 45
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