Respuesta :

Lophile
For #1. 3x + x +7 = 180 degrees
4x + 7 = 180
4x = 173
so x = 43.25

For #2. 2x + 5 = 110 degrees
2x = 105
so x = 52.5

For #3. 1 and 3, 2 and 4, 5 and 8, 6 and 7.
qwerty101
1)x = 43.3

2)  x = 52.5

3). 1 and 3, 2 and 4, 5 and 8, 6 and 7.