## Friday, January 13, 2012

### Limaçon & Cardioid

A limaçon is a snail curve. The equations $r=a\pm b\cos\theta$ and $r=a\pm b\sin\theta$ give to the shape of it when $a\neq b$.

When $a=b$, a cardioid is formed. Try to change the values of a and b by dragging it. You may also drag the value of $\theta$ to see the forming of the curve.

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Betty, Created with GeoGebra