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 X B b A B a A D Y AB Τ BD a Τ b XY Τ AB

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

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

6. PROVE IT!!!!

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

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

9. 2.2 Complementary and Supplementary Angles