I don't exactly want to give away the answers, but I can give away a key that helps you in getting the answers. Every line is 180 degrees. So if you add up all the angles on that line, let's take number one as an example, you will get 140 degrees. Now, to find the last angle, you subtract 180 with whatever you have. As a simplified version, here are some steps:
1. Add all the angles
2. Subtract 180 with your result
3. enjoy the satisfaction of finishing math work
