This is a support page for Polar Graphing. Here is review material and polar graph paper. Below are links for further research, and some suggested tasks/questions.

• unit circle
• radian
• polar and other graph paper

    Cardioid is Greek for "heart."

• Use the formulas at the left and Polar Graphing to seek why it has this name.
• Use the link just above and make your own cardioid.
• Feel lazy or want a hink of the possibilities, see bPolarLibrary and dPolarLibrary.
• Do some research to see what a Wankle engine has to do with a cardioid.
• Check out Cardioid at Wikipedia.

    Limacon is Latin for snail.

• Visit Limacon at History at St. Andrews.
• See: Limaçon trisectrix -- angle trisection at Wikipedia.
• Take the equation at the left an see if you can generate a similar curve you like better.

    Lemniscatus is Latin for "decorated with ribbons" and these look like a figure 8.

    See Lemniscate at Wikipedia.