In the rectangular coordinate system, are the points (r,s) and (u,v) equidistant from the origin?
(2) u=1-r and v=1-s
Use the distance formula D=sqrt of (x1-x2)^2+(y1-y2)^2
Use the D formula for both (r,s) and (u,v) for x2 and y2 for both equations use 0,0.
This gives you r^2+s^2=u^2+v^2
now looking at the stmnts. 1 is clearly not sufficient
2: doesnt give us everything we need either.
S1 and S2 give us enough to solve this out.