Question

Tell whether the angles are complementary or supplementary. Then find the value of x​

Answer 1

12) complementary, x=15

13) complementary, x = 35

x+ (x-20) = 90

x+x+20=90

2x=70

x=35

14) supplementary, x=31

2x+3x+25=180

5x=155

x=31

15) <1 = 130 degrees

<2 = 50 degrees

<3 = 130 degrees

16) x=53

x+2x+21=180

3x=159

x=53