Angle Pairs

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Angle Pairs
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Vertical Angles

• Two angles formed by intersecting lines and have
  no sides in common.
• Are congruent.

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Vertical Angles
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Supplementary Angles

• Two angles sharing one side that add up to
  exactly 180

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Supplementary Angles
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Complementary Angles

• Two angles, sharing one side that add up to
  exactly 90

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Complementary Angles
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Adjacent Angles

• Adjacent angles share a common vertex and one
  common side.

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Adjacent Angles
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Adjacent Angles
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Supplementary vs. ComplementaryHow do I remember?

• The way I remember is this
• C comes before S in the alphabet.
• 90 comes before 180 when I count.
• Complementary is 90, Supplementary is 180.

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Guess Who?

• I am an angle.

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Guess Who?

• I am an angle.
• I have 180

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Guess Who?

• I am an angle.
• I have 180
• I look like this

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Guess Who?

• I am an angle.
• I have 180
• I look like this

Supplementary
Complementary
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Guess Who?

• I am two adjacent angles.

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Guess Who?

• I am two adjacent angles.
• I look like an L with a line in the middle.

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Guess Who?

• I am two adjacent angles.
• I look like an L with a line in the middle.
• I add up to 90
• I look like this

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Guess Who?

• I am two adjacent angles.
• I look like an L with a line in the middle.
• I add up to 90
• I look like this

Complementary
Supplementary
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Guess Who?
Complementary
Supplementary
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Guess Who?
Complementary
Supplementary
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Review

• Complementary angles are.

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Review

• Complementary angles are.

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Review

• Supplementary Angles are..

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Supplementary Angles
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Vertical Angles are.
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Vertical Angles
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Adjacent Angles are
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Adjacent Angles
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Find the missing angle
I know that these angles are complementary. They
must add up to 90 So 90 55 35 The
missing angle is 35
55
x
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You try.
Are they supplementary or complementary? Find
the missing side.
x
20
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You try.
Are they supplementary or complementary? complemen
tary Find the missing side. 90 20 70 The
missing angle Is 70
x
20
33
One More
50
x
34
Find the missing angle
120
x
I know these are supplementary angles. Supplementa
ry angles add up to 180. The given angle is 120.
So.. 180 120 60 The missing angle is 60
35
Find the missing angle
130
x
What kind of angles? Whats the missing angle?
36
Find the missing angle
130
x
What kind of angles? Supplementary Whats the
missing angle? Adds up to 180, so.. 180 130
50
37
Find the missing angle
x
30
Do this one on your own.
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Right
39
Wrong