OFFSET
1,2
COMMENTS
Area of the vesica piscis, i.e., the area common to two overlapping unit circles with offset equal to the circle's radii.
LINKS
Eric Weisstein's World of Mathematics, Lens
Wikipedia, Vesica piscis
EXAMPLE
1.22836969...
MATHEMATICA
RealDigits[(-3Sqrt[3]+4\[Pi])/6, 10, 150][[1]] (* Harvey P. Dale, Mar 20 2011 *)
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Eric W. Weisstein, Apr 14 2004
STATUS
approved