Update index.html

Fix

Author: Gmac4247

index.html

@@ -827,7 +827,7 @@ <h3 style="margin:7px" itemprop="eduQuestionType">Area of a Triangle</h3>
 <p itemprop="description" style="margin:12px">The area of a triangle can also be calculated by the length of its sides.</p>
 <br>
 <div itemprop="result">
-<math style="margin:12px"> xmlns="http://www.w3.org/1998/Math/MathML"> 
+<math style="margin:12px" xmlns="http://www.w3.org/1998/Math/MathML"> 
 <mrow>
 <mi>S</mi>
     <mo>=</mo>
@@ -4189,8 +4189,8 @@ <h3 itemprop="eduQuestionType" style="margin:12px">Volume of a horizontal Frustu
 <br>
 The height of the theoretical full pyramid can be calculated by the frustum height and the ratio between the top and bottom edges or areas.</p>
 <br>
-<div itemprop="result" itemscope itemtype="https://schema.org/MathSolver">
-<math display="block" itemprop="mathExpression" xmlns="http://www.w3.org/1998/Math/MathML">
+<div itemprop="result">
+<math display="block" xmlns="http://www.w3.org/1998/Math/MathML">
      <mrow>
  <mi>V</mi>
       <mo>=</mo>