1. 7.1 (Day 2) Coterminal Angles

2. Angles in Standard Position I ( +, + ) 00 Vertex at origin Initial side along pos x-axis II ( –, + ) III ( –, – ) IV ( +, – ) 90  180  270  x y (0, 0) 60  150 

3. Coterminal Angles When placed in standard position, terminal sides coincide n is any integer  + n∙360  60  420 

4. Ex 1) Find 2 (+) and 2 (–) angles that are coterminal to 37  397  37  + 1∙360  = 757  37  + 2∙360  = – 323  37  + (–1)∙360  = – 683  37  + (–2)∙360  =

5. Triangles 180  Sum of 3  ’s in  = Oblique  : Isosceles  : has 2 equal sides (& 2 =  ’s) If 2  ’s of one  = 2  ’s of other  → corresp. sides are proportional Similar  ’s: Equilateral  : all 3 sides are = (& 3 =  ’s)  that is not a right 

6. Ex 2) If a 6-foot man casts a 2-foot shadow & a building casts a 12-foot shadow, how tall is the building? 2 12 x 6

7. Ex 3) Pg. 384 Example 5 6 20 5 2 x 31 – 5 – 6 = 20 Small  Large 

8. Homework #702 Pg. 385 41 – 48 all, 49 – 67 odd