Update index.html

Author: Gmac4247

index.html

@@ -1489,17 +1489,18 @@ <h3 itemprop="name" style="margin:7px">Trigonometry</h3>
 <meta itemprop="educationalLevel" content="from basic to advanced">
 <meta itemprop="typicalAgeRange" content="6-18">
 <section itemprop="mathExpression" itemscope itemtype="https://schema.org/SolveMathAction" id="triangle">
-<dl>
-<dt style="margin:7px" itemprop="eduQuestionType">Area of a Triangle</dt>
+<div>
+<h3 style="margin:7px" itemprop="eduQuestionType">Area of a Triangle</h3>
 <meta itemprop="target" content="https://basic-geometry.github.io?q={triangle_side1=3_side2=4_side3=5_area=?}">
 <div itemprop="result" itemscope itemtype="https://schema.org/LearningResource">
 <meta itemprop="name" content="Triangle area formula">
 <meta itemprop="usageInfo" content="Either by base length and height, or perimeter">
 <br>
 <p itemprop="description" style="margin:12px">The area of a triangle equals half of the area of a rectangle with a width equal to the base of the triangle and length equal to the height of the triangle.</p>
-<p itemprop="abstract" style="margin:12px">The base of a triangle multiplied by its height equals a rectangle with twice the area of the triangle.
+<dl>
+<dt itemprop="abstract" style="margin:12px">The base of a triangle multiplied by its height equals a rectangle with twice the area of the triangle.
 <br>
-The square root of half of the area of the rectangle is the side length of the theoretical square that has the same area as the triangle.</p>
+The square root of half of the area of the rectangle is the side length of the theoretical square that has the same area as the triangle.</dt>
 <br>
 <dd itemprop="text">
 <math display="block" xmlns="http://www.w3.org/1998/Math/MathML">
@@ -1519,6 +1520,7 @@ <h3 itemprop="name" style="margin:7px">Trigonometry</h3>
  </mrow>
 </math>
 </dd>
+</dl>
 </div>
 <br><br>
 <div itemprop="result" itemscope itemtype="https://schema.org/LearningResource">
@@ -1559,7 +1561,7 @@ <h3 itemprop="name" style="margin:7px">Trigonometry</h3>
 </math>
 </div>
 <br><br><br>
-<dd itemprop="text">
+<div itemprop="text">
 <math display="block" xmlns="http://www.w3.org/1998/Math/MathML"> 
 <mrow>
  <mi>A</mi>
@@ -1600,9 +1602,8 @@ <h3 itemprop="name" style="margin:7px">Trigonometry</h3>
 </mrow>
 </mrow>
 </math>
-</dd>
 </div>
-</dl>
+</div>
 <br><br>
 <div itemprop="subjectOf" itemscope itemtype="https://schema.org/SoftwareApplication" style="margin:12px" id="triangle_area_calculator">
 <meta itemprop="name" content="Triangle Area Calculator">