Update index.html

Author: Gmac4247

index.html

@@ -2218,7 +2218,7 @@ <h3 itemprop="name" style="margin:7px">Calculate the Area of a Circle</h3>
 </span>
 </div>
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-<p>The equation can be simplified algebraically.</p>
+<p itemprop="description">The equation can be simplified algebraically.</p>
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 <div itemprop="description">
 <p>Dividing both sides by 3.2r² :</p>
@@ -3842,9 +3842,9 @@ <h3 itemprop="name" style="margin:7px">Calculate the Volume of a Sphere</h3>
 <strong>It was approximated by comparing a hemisphere to the difference between the approximate volume a cone and a circumscribed cylinder.
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 That is a very exaggerated, distortion-based comparison that discards the difference between the straight slant height of a cone and the curvature of a sphere, resulting in a very rough underestimate.</strong></p>
+<br>
 </details>
 </section>
-<br>
 <div style="margin:12px" itemprop="about" itemscope itemtype="https://schema.org/PropertyValue">
 <meta itemprop="description" content="Cross-sectional area of the sphere: Area = 3.2 × radius^2">
 <span itemprop="name">A<sub>(cross-section)</sub> </span>=