Valentine's Day is a good excuse to explore parametric equations. First students figure the coordinates of this figure using trigonometric unit triangles. Then they simplify and accelerate this task with either a graphing calculator or with online software like Desmos or GraphSketch.com.

The activity: ParametricHeart.pdf

For members we have an editable Word docx, an Excel sheet, and tips/solutions.

ParametricHeart.docx    ParametricHeart.xlsx    ParametricHeart-solution.pdf

CCSS:HSG.SRT, HSF.TF