MACROMEDIA FLASH 8-EXTENDING FLASH Manual page 329

Math.pointDistance()
Availability
Flash MX 2004.
Usage
Math.pointDistance(pt1, pt2)
Parameters
and Specify the points between which distance is measured.
pt1 pt2
Returns
A floating-point value that represents the distance between the points.
Description
Method; computes the distance between two points.
Example
The following example stores the value for the distance between and in the
pt1 pt2 dist
variable:
var pt1 = {x:10, y:20}
var pt2 = {x:100, y:200}
var dist = fl.Math.pointDistance(pt1, pt2);
Math object 329