A(5,2),B(3,4)
k(AB)=-1
(xA+xB)/2=(5+3)/2=4,((yA+yB)/2=(2+4)/2=3
M(4,3)
C(3,a)
k(CM)=-1/k(AB)=-1/(-1)=1
(3-a)/(4-3)=1
a=2,C(3,2)
r=yB-yC=4-2=2
C:(x-3)^2+(y-2)^2=4
A(5,2),B(3,4)
k(AB)=-1
(xA+xB)/2=(5+3)/2=4,((yA+yB)/2=(2+4)/2=3
M(4,3)
C(3,a)
k(CM)=-1/k(AB)=-1/(-1)=1
(3-a)/(4-3)=1
a=2,C(3,2)
r=yB-yC=4-2=2
C:(x-3)^2+(y-2)^2=4