{c=sqrt((-2864.66-27.35)^2+(5348006.28-5348215.33)^2),a/sin 57.987°=b/sin 64.3°=c/sin(180°-57.987°-64.3°), a^2=(x+2864.66)^2+(y-5348006.28)^2, b^2=(x-27.35)^2+(y-5348215.33)^2}