plocha č.														
n'														
n														
r														
d														
														
x														
n/x														
' = (n'-n)/r														
n'/x'														
x'														
x'-d														
x'/(x'-d)														
														
	c = 				c = 				c = 				c = 	
														
plocha č.														
n'														
n														
r														
d														
														
x														
n/x														
' = (n'-n)/r														
n'/x'														
x'														
x'-d														
x'/(x'-d)														
														
	c = 				c = 				c = 				c =