// Tom Wexler

import java.util.*;
import java.io.*;

class v {
  double x,y;

  public v (double x, double y) {
    this.x = x;
    this.y = y;
  }

  public v minus (v a) {return new v(x-a.x, y-a.y);}

  public double mag() {return Math.sqrt(x*x+y*y);}

  public v scale (double s) {return new v(s*x, s*y);}

  public double dot(v a) {return x*a.x+y*a.y;}
}

public class Tom1 {

    public static double round(double d) {
      return ((int)(d*100+.5))/100.0;
    }

    public static boolean collide(v a, v b, v c, float r) {
      c = c.minus(a);
      b = b.minus(a);
      v proj = b.scale(b.dot(c)/b.dot(b));
      if (proj.dot(b) < 0) return false;
      if (b.minus(proj).dot(b) < 0) return false;
      return (c.minus(proj).mag() < 2*r);
    }

    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int w = input.nextInt();
        int l = input.nextInt();
          int r = input.nextInt();
          int x1 = input.nextInt();
          int y1 = input.nextInt();
          int x2 = input.nextInt();
          int y2 = input.nextInt();
          int x3 = input.nextInt();
          int y3 = input.nextInt();
          int h = input.nextInt();

          v left = new v(0,l);
          v right = new v(w,l);
          v b1 = new v(x1,y1);
          v b2 = new v(x2,y2);
          v b3 = new v(x3,y3);

          v temp = right.minus(b3);
          v t3 = b3.minus(temp.scale(2*r/temp.mag()));

          temp = left.minus(b2);
          v t2 = b2.minus(temp.scale(2*r/temp.mag()));

          temp = t3.minus(b1);
          v t1 = b1.minus(temp.scale(2*r/temp.mag()));

          v mir = t3.minus(b1);
          v ref = t2.minus(t1);
          v result = mir.scale(2*mir.dot(ref)/mir.dot(mir)).minus(ref);

          result = result.scale(1/result.mag());
          double x = t1.x - (t1.y-h)/result.y*result.x;
          double theta = 180+180/Math.PI*Math.atan2(result.y,result.x);
          v cue = new v(x,h);

          if (x < r || x > w-r) {
            System.out.println("impossible");
          }
          else if (result.minus(t1).dot(b1.minus(t1)) >= 0) {
            System.out.println("impossible");
          }
          else if (t1.minus(t2).dot(b2.minus(t2)) >= 0) {
            System.out.println("impossible");
          }
          else if (b1.minus(t3).dot(b3.minus(t3)) >= 0) {
            System.out.println("impossible");
          }
          else if (collide(cue,t1,b2,r)) {
            System.out.println("impossible");
          }
          else if (collide(cue,t1,b3,r)) {
            System.out.println("impossible");
          }
          else if (collide(t1,t2,b3,r)) {
            System.out.println("impossible");
          }
          else if (collide(b1,t3,b2,r)) {
            System.out.println("impossible");
          }
          else if (t1.x < r || t1.x > w-r || t1.y < r || t1.y > l-r) {
            System.out.println("impossible");
          }
          else if (t2.x < r || t2.x > w-r || t2.y < r || t2.y > l-r) {
            System.out.println("impossible");
          }
          else if (t3.x < r || t3.x > w-r || t3.y < r || t3.y > l-r) {
            System.out.println("impossible");
          }
          else {
//            System.out.println(""+round(x)+" "+round(theta));
System.out.println(String.format("%.02f %.02f",x,theta));
          }
    }
}