C1,C2交点A(0,2),B(8/5,6/5)
C1(0,0),C2(1,2)
在C1C2上找点C3,与C1,A,B等距离,C3(1/2,1),C1C3 =根号(5)/2
C3:(x-1/2)^2 + (y-1)^2 = 5/4
x^2 + y^2 - 2y -x = 0
C1,C2交点A(0,2),B(8/5,6/5)
C1(0,0),C2(1,2)
在C1C2上找点C3,与C1,A,B等距离,C3(1/2,1),C1C3 =根号(5)/2
C3:(x-1/2)^2 + (y-1)^2 = 5/4
x^2 + y^2 - 2y -x = 0