## Advanced Euclidean Geometry

- R. A. Johnson
- Dover Publications,
- 2007

In this note, we discuss the cardiod. We give purely geometric proofs of its well-known properties. Definitions and Basic Properties Fig. 1 The curve in Figure 1 is called a cardioid. The name is derived from the Greek word “καρδια” meaning “heart”. A cardioid has many interesting properties and very often appears in different fields of mathematics and… (More)