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<!DOCTYPE html>
<html>
<head>
  <style>
    #point::after {
      content: "\2246";
    }
  </style>
</head>
<body>

  <h1>Approximately but not actually equal (U+2246) in HTML</h1>

  <p>Using Hex Code: &#x2246;</p>
  <p>Using HTML Code: &#8774;</p>
  <p id="point">Using CSS Entity: </p>

</body>
</html>

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HTML Entity for Approximately But Not Actually Equal To (≆)