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<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>JS Bin</title>
</head>
<body>

<script id="jsbin-javascript">
var x1 = Number(prompt("insira X1"));
var x2 = Number(prompt("insira x2"));
var y1 = Number(prompt("insira y1"));
var y2 = Number(prompt("insita y2"));
var a = Math.pow((x2 - x1),2);
var b = Math.pow((y2 - y1),2);
var ab=(a+b);
alert (ab);
var abraiz= Math.sqrt(ab);
alert (abraiz);
</script>


<script id="jsbin-source-javascript" type="text/javascript">var x1 = Number(prompt("insira X1"));
var x2 = Number(prompt("insira x2"));
var y1 = Number(prompt("insira y1"));
var y2 = Number(prompt("insita y2"));
var a = Math.pow((x2 - x1),2);
var b = Math.pow((y2 - y1),2);
var ab=(a+b);
alert (ab);
var abraiz= Math.sqrt(ab);
alert (abraiz);</script></body>
</html>