square root 2.py

#!/usr/bin/env python
__author__ = 'Ernest'

import math


def distance(x1, y1, x2, y2):
    dx = x2 - x1
    dy = y2 - y1
    dsquared = dx**2 + dy**2
    result = dsquared**0.5
    return result


def area(radius):
    temp = 3.14159 * radius**2
    return temp


def area2(xc, yc, xp, yp):
    radius = distance(xc, yc, xp, yp)
    result = area(radius)
    return result

a = area2(1, 2, 4, 6)
print a