# -*- coding: cp1250 -*-
# http://pastebin.com/k3JYgMgq
from turtle import *
n = 50
def prikazi (t) :
  x, y = T[t]
  up(); goto (x*n, y*n);  pd(); dot(); up()
  tx = t +'(' +str(x) +', ' +str(y) +')'
  write(' '+tx, True, "left", ("Consolas", 10, "normal"))

def spoji (X, Y) :
  x, y = T[X]; up(); goto (x*n, y*n)
  x, y = T[Y]; pd(); goto (x*n, y*n)
  X = T[X]; Y = T[Y]
  X = complex (X[0], X[1]); Y = complex (Y[0], Y[1])
  return round (abs(X-Y), 2)

ht()
up(); goto(-5*n, 0); pd(); goto(5*n, 0)
up(); goto(0, -5*n); pd(); goto(0, 5*n)

T = {}
T['A'] = input ('Koordinate točke A ')
T['B'] = input ('Koordinate točke B ')
T['C'] = input ('Koordinate točke C ')

prikazi ('A');  prikazi('B');  prikazi ('C')
c = spoji ('A', 'B'); a = spoji ('B', 'C'); b = spoji ('C', 'A')
O = a +b +c;  s = O/2;  P = (s*(s-a)*(s-b)*(s-c))**0.5
print 'O =', O, 'P =', P