Question

Can anyone help me pls?

Answer 1

Basic fact:

angles on a straight line always add up to 180 degrees

Explanation:

1. 39+a=180 a=141
2. 157+a=180 a=23
3. 92+a=180 a=88
4. 60+a=180 a=120
5. 61+a=180 a=119
6. 28+a=180 a=152
7. 52+a=180 a=128
8. 121+a=180 a=59
9. 151+a=180 a=29
10. 128+a=180 a=52

Answer 2

in every question you should subtract the given value by 180