1. http://video.google.com/videoplay? docid=8157409168878797983&ei=h - ziSuD0MaS6lQfkjKSqDQ&q=parallel +lines+transversals&hl=en# Parallel Lines and a Transversal

2. Alternate Interior Angles 12 43 56 78 Can you name two pairs of alternate exterior angles?  1 and  8 or  2 and  7

3. 12 43 56 78 Consecutive Exterior Angles Name another pair of consecutive Exterior angles.  1 and  2

4. 12 43 56 78 Can you name two pairs of consecutive interior angles?  3 and  4 or  5 and  6

5. 12 43 56 78 Corresponding Angles Name other corresponding angles.  1 and  5  3 and  7  4 and  8

6. You can see supplementary and vertical…

7. 12 43 56 78 Choose any two angles and the relationship is either congruent or supplementary! Congruent…  1 and  5 or  1 and  8 Supplementary…  1 and  7 or  1 and  6 There are many more…

8. Example 1: Find x. One angle is obtuse and the other is acute, therefore they cannot be equal. The value of x is 12 .

9. Unsure… Use the corner test! Example 2: Find the measure of  A. A These are both acute angles… Then they are equal… Angle A is supplementary to a 70 , therefore  A=110 