1、x+4y+4z=r^2=1,
2、x+3y+2z=πr^2/4=π/4,
S△=(√3/4)*r^2=√3/4,
3、x+2y+z=2*(πr^2/6-S△)+S△=π/3-√3/4,
解得:x=π/3-√3+1.