Update index.html

Author: Gmac4247

index.html

@@ -1489,7 +1489,6 @@ <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">
-<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">