<!DOCTYPE html>
<html lang="en-US">
<head>
<style>
#point:after{
content:"\00303";
}
</style>
</head>
<body>
<p>Tilde Strong using Hexa Decimal: ̃</p>
<p>Tilde Strong using HTML Code: ̃</p>
<p id="point">Tilde Strong using CSS Entity: </p>
</body>
</html>