1. Angles and Transversal lines
Advanced Learning Target 2: I can use informal arguments to establish facts about angles and lines.

2. Two Lines Intersected by Transversal
Alternate Interior Angles
These angles are Congruent

3. Two Lines Intersected by Transversal
Alternate Exterior Angles
Alternate Exterior Angles
These angles are Congruent

4. Two Lines Intersected by Transversal
These angles are Supplementary
Same-Side Interior

5. Two Lines Intersected by Transversal
These angles are Supplementary
Same-Side Exterior
Same-Side Exterior

6. Two Lines Intersected by Transversal
Corresponding Angles
Corresponding Angles

7. Carnegie 10.3 # 8-Alt. Int. Angles
Which Angle is an Alternate Interior Angle?

8. Carnegie 10.3 #19 X° 80° 100° X- 20° 80° 100° 100° 80° 100° 80°
Determine all the measures.
So we know that X- 20° + X° = 180 °
Then combine like terms so we now have
2X- 20°= 180 °
Then add 20 to both sides
2X= 200 °
Then divide by 2
X= 100 °
Now we can fill in our missing angles
80°
100°
X- 20° X°
100°
80°
100°
80°
100°
80°

9. Continue Working on 10.3 Homework # 2-6,9,10,12,18,20