orientation   2 videos

• 

  Parametrizing a Circle

  Precalculus Vectors and Parametric Equations

  How to write the parametric equations of a circle centered at (0,0) with radius r, oriented counter-clockwise.

  the unit circle cosine sine parametrization parametric equations circle counter clockwise
• 

  Reflections

  Geometry Transformations

  How to describe the effect of a reflection, how to describe the effect of the ordered pair rules (x,y) -> (-x, y),(x,y) -> (x, -y), (x,y) -> (y, x).

  transformation isometry orientation image equidistant ordered pair rules map x axis y axis line y = x