#include<stdio.h> #include<math.h> int main() { int r, x1, y1, x2, y2, x3, y3, x0, y0; while(scanf("%d %d %d %d %d %d %d %d %d", &r, &x1, &y1, &x2, &y2, &x3, &y3, &x0, &y0) != EOF) { double d[3]; d[0] = pow((x1-x0)...