The student will be able to give angle measures in degrees and radians and locate coterminal and reference angles.
- Drag the red point to change the angle on the graph.
- The alpha angle is in "Standard Position." Notice that one ray of the angle stays in the same place. Where is the other ray when the angle is 0 degrees? 90°? 180°? 270°? 360°?
- Now notice the relationship between the alpha angle and the theta angle. The theta angle is called the "Reference Angle."
Clark U: Online notes on degree and radian measures. Clark U
Interactive Math: Online notes on degree and radian measures.Interactive Math
- Click the button for an Online Puzzle