Update index.html

Author: Gmac4247

index.html

@@ -94,6 +94,10 @@
 <meta name="twitter:title" content="Home of Basic Geometry">
 <meta name="twitter:description" content="Introducing the best-established and most accurate framework to calculate area and volume.">
 <meta name="twitter:image" content="android-chrome-256x256.png">
+<script src="https://polyfill.io/v3/polyfill.min.js?features=es6"></script>
+<script id="MathJax-script" async
+  src="https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js">
+</script>
 <script type="application/ld+json" async>
 {
   "@context": "https://schema.org",
@@ -1844,24 +1848,7 @@ <h6 style="font-size:160%;margin:7px">Area of a circle</h6>
 The edge length of the cube, which has the same volume as the sphere, equals the square root of the area of the square that has the same area as the sphere's cross section.
 <br>
 <br>
-<math xmlns="http://www.w3.org/1998/Math/MathML" >
-<mrow>
-<mi>V</mi>
-<mo>=</mo>
-<msup>
-<mrow>
-<mo>(</mo>
-<msqrt>
-<mn>3.2</mn>
-</msqrt>
-<mo>×</mo>
-<mi>r</mi>
-<mo>)</mo>
-</mrow>
-<mn>3</mn>
-</msup>
-</mrow>
-</math>
+V = \left( \sqrt{3.2} \cdot r \right)^3
 </p>
 </div>
 <br>