Complementary; x=25

Complementary; x=5

Supplementary; x=25

Supplementary; x=5

18°

28°

38°

118°

2x-6=7x+4

2x-6+7x+4=90

2x-6+7x+4=180

2x-6+7x+4=360

Alternate Interior Angles

Supplementary Angles

Vertical Angles

Corresponding Angles

Complementary

Supplementary

70

10

3

103

61

40

54

47

Complementary; 

5x + 3 + 83 = 90

Supplementary; 

5x + 3 + 83 = 180

Vertical; 

5x + 3 + 83 = 90

Vertical; 

5x + 3 = 83

5

90

25

10

20

25

120

180