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Khan Academy
Khan: Lesson 16: Part 2 Coordinate Geometry; Trigo and Radians; Complex Numbers
2 OF 2 FOR ADDITIONAL TOPICS IN MATH. Young scholars will use the coordinate plane and equations of lines and circles to describe figures; create the equation of a circle given the figure or use the structure of a given equation to...
Khan Academy
Khan Academy: Drawing Polygons With Coordinates 2
In this exercise, students practice drawing polygons with coordinates. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.
Khan Academy
Khan Academy: Practice: Rotate Points
In this set of questions, students use an interactive tool to rotate objects on a Cartesian grid. Help is available through hints and videos.
Windstream
Ojk's Precalculus Study Page: Measurement of Angles
An introduction to radian measurement, including converting between radians and degrees. Includes several examples and lots of pictures.