Question

Use the figure for Exercises 1–10. For Exercises 1–3, suppose a || b and c || d.
1. 2 and 10 are what kind of angles?
2. 3 and what angle are alternate interior angles? 3. 9 and 8 are what kind of angles?
4. Which angle could you show is congruent to 11 to prove a || b?
5. What relationship between 6 and 11 shows c || d? For Exercises 6–10, suppose a || b and c || d.

6. If m6 = 50, then find m11.
7. If m2 = 70, then find m6.
8. If m1 = 130, then find m5.
9. If m7 = 110, then find m10.
10. If m4 = 45, then find m12.

Answer 1

It might help to see a picture of the figure. This also belongs more in the geometry section

Answer 2

Here is the whole .pdf

Answer 3

Alright, cool.
1. Corresponding angles.
2. Angle 5 and angle 3 are alternate interior angles
3. Consecutive interior angles
4. Angle 9 or 7
5. Should add to 180 degrees or something but I'm not sure on that.
6. 130
7. 70
8. 130
9. 70
10.45

Answer 4

I'm not sure if those are exactly right or not, but all you are doing is using angle theorems to find your answers.
This site might help you understand them better http://www.wyzant.com/resources/lessons/math/geometry/lines_and_angles/angle_theorems