1. A3 5.1a & b Starting the Unit Circle! a)HW: p. 530-531 1-69 EOO b)HW: p. 530-531 2-70 EOE

2. Definitions Associated with Angles Ray – part of a line that has only one endpoint, and extends forever in the opposite direction Angle – formed by 2 rays Initial side – beginning Terminal side – ending Vertex – endpoints of initial and terminal sides Standard Position – initial side on positive x-axis, vertex at the origin Positive Angle – rotates counterclockwise (across the top) Negative Angle – rotates clockwise (across the bottom)

3. Definitions Associated with Angles Quadrants and their signs: Acute angle: Right angle: Obtuse angle: Straight angle:

4. Measuring Angles Central angle – measure of intercepted arc Degrees (angle of rotation) Radians (length of intercepted arc)

5. Cool Formula Converting between degrees and radians

6. Examples for angle conversions

7. Angles in Standard Position -Initial side must be on the positive x-axis -Rotation must be labeled -All complementary angles should be labeled

8. Draw Angles in Standard Position

9. Coterminal Angles In simple terms – 2 ways of arriving at the same terminal side. Find an angle that is coterminal and draw the angles in standard position.