<!DOCTYPE html>
<html lang="en-US">
<head>
<style>
#point:after{
content:"\022BF";
}
</style>
</head>
<body>
<p>Right Triangle using Hexa Decimal: ⊿</p>
<p>Right Triangle using HTML Code: ⊿</p>
<p>Right Triangle using HTML Entity: ⊿</p>
<p id="point">Right Triangle using CSS Entity: </p> </body>
</html>