Cone volume and surface

#!/usr/bin/python
# Andres Kwan

import math

try:
    r  = float(raw_input('radius\n'))
    s  = float(raw_input('lateral height\n'))
except:
    print 'Enter a number!'
    exit()

cone_surface   = math.pi * r * s + math.pi * r ** 2
base_area      = math.pi * (r ** 2)
cone_hight     = math.sqrt(s ** 2 - r ** 2 )
cone_volume    = 1.0/3.0 * base_area * cone_hight
#print 'surface of the cone: ' + str(surface)

print 'surface of the cone: ', cone_surface
print 'base_area: ', base_area
print 'cone_hight: ', cone_hight
print 'volume of the cone: ', cone_volume