ikeryou

var dx:Number = x2 - x1;
var dy:Number = y2 - y1;
var angle:Number = Math.atan2(dy, dx); // ラジアン

ikeryou

var dx:Number = x2 - x1;
var dy:Number = y2 - y1;
var dist:Number = Math.sqrt(dx * dx + dy * dy);