Complementary and
Supplementary Angles
7.G.5
Types of angles
Right Angle = 90°
Acute Angle = Greater than 0°
but less than 90°
Straight Angle = 180°
Obtuse Angle = Greater than
90° but less than 180°
Complementary Angles
Two angles that add up to 90°
40 + 50 = 90°
These angles are complementary
30 + 60 = 90°
These angles are complementary
Complementary Angles
Determine the value of x is the given angles are
complementary.
x + 62 = 90
x + 62 = 90
- 62 -62
x = 28°
Complementary Angles
Determine the value of x is the given angles are
complementary.
x + 15 = 90
x
x + 15 = 90
- 15 -15
x = 75°
Complementary Angles
Determine the value of x is the given angles are
complementary.
Complementary Angles
Determine the value of x is the given angles are
complementary.
Complementary Angles
Determine the value of x is the given angles are
complementary.
Complementary Angles
Determine the value of x is the given angles are
complementary.
Complementary Angles
Determine the value of x is the given angles are
complementary.
3x + 6 + 48 = 90
3x + 54 = 90
- 54 -54
3x = 36
3𝑥
3
=
36
3
x = 12°
Complementary Angles
Determine the value of x is the given angles are
complementary.
Complementary Angles
Determine the value of x is the given angles are
complementary.
Complementary Angles
Determine the value of x is the given angles are
complementary.
Complementary Angles
Determine the value of x is the given angles are
complementary.
What is the complement of 63°
x + 63 = 90
x + 63 = 90
- 63 -63
x = 27°
What is the complement of 63°
What is the complement of 32°
What is the complement of 51°
What is the complement of 28°
Supplementary Angles
• Two angles that add up together to 180°
130 + 50 = 180°
These angles are supplementary
120 + 60 = 180°
These angles are supplementary
Supplementary Angles
Determine the value of x is the given angles are
complementary.
x + 77 = 180
x + 77 = 180
- 77 -77
x = 103°
Supplementary Angles
Determine the value of x is the given angles are
complementary.
x + 121 = 180
x + 121 = 180
- 121 -121
x = 59°
Supplementary Angles
Determine the value of x is the given angles are
complementary.
Supplementary Angles
Determine the value of x is the given angles are
complementary.
Supplementary Angles
Determine the value of x is the given angles are
complementary.
Supplementary Angles
Determine the value of x is the given angles are
complementary.
Supplementary Angles
Determine the value of x is the given angles are
complementary.
Supplementary Angles
Determine the value of x is the given angles are
complementary.
Supplementary Angles
Determine the value of x is the given angles are
complementary.
Supplementary Angles
Determine the value of x is the given angles are
complementary.
What is the supplement of 135°
What is the supplement of 28°
What is the supplement of 124°
What is the supplement of 51°