1. Warm Up  Read A Look Back and A Look Ahead…  Pg 61 in Geometry Book  Write a short paragraph on your feelings about geometry so far. Where do you think your challenges will be?

2. 2.1 Perpendicularity

3. Perpendicular: lines, rays or segments that intersect at right angles. Τ Symbol for perpendicular Τ a b a b A D B ABBD X Y AB XYAB Τ Τ

4. If <B is a right angle, then AB BC Τ C A B Can’t assume unless you have a right angle or given. Τ

5. x axis y axis -3 -2 -1 1 2 3 321 123321 123 A C D B Given: AB BC DC AD Conclusion: <B = <D ~ Τ Τ

6. PROVE IT!!!!

7. Given: KJ KM <JKO is 4 times <MKO Find both angles (Draw and label the diagram) Τ

8. Given EC ll x axisPoint C (7,3) CT ll y axisPoint R (-4, -2) Find the area of RECT

9. 2.2 Complementary and Supplementary Angles