Euclid  
Euclid has a few builtin constants. You can use these constants in expressions just like any of your userdefined variables. pi pi is ratio of a circle's circumference to its diameter. It is 3.14159... phi phi is the golden ratio. It is (1 + sqrt(5)) / 2. epsilon epsilon is the symbol used for e, the natural logarithm. It is 2.718... 
Euclid 
Copyright © 20032006 Kevin L. Gong

