/sci/ - Science & Math

if I have the starting center coord and radius for two circles, how do i find the intersection of two spheres if I know they only intersect once?

like in my pic, if I know circle 1 on the left starts at x,y,z coords (1, 1, 0) with r=1 and circle 2 starts at (3, 1, 0) with r=1, how can i find the intersection point