#
#
#
from math import sqrt

def distance(x1, y1, x2, y2):
    return sqrt((x2 - x1) ** 2 + (y2 - y1) ** 2)

#def inputpoint(prompt):
#    return float(input("Please enter the co-ordinate for " + prompt))

def inputpoint(xory, pointname):
    return float(input("Please enter the " + xory + " co-ordinate for the " + pointname + " point> "))

# Enter the x coordinate of the first point"

x1 = inputpoint("x", "first")
y1 = inputpoint("y", "first")
x2 = inputpoint("x", "second")
y2 = inputpoint("y", "second")
x3 = inputpoint("x", "third")
y3 = inputpoint("y", "third")

print(x1, y1, x2, y2, x3, y3)

# side lengths
side1length = distance(x1, y1, x2, y2)
side2length = distance(x2, y2, x3, y3)
side3length = distance(x3, y3, x1, y1)

# add to get perimeter and print it
perimeter = side1length + side2length + side3length
print("Perimeter:", perimeter)