Update index.html

Spacing

Author: Gmac4247

index.html

@@ -5234,6 +5234,7 @@ <h3 itemprop="name" style="margin:7px">Calculate the Volume of a Tetrahedron</h3
 <figure class="imgbox" itemprop="image" itemscope itemtype="http://schema.org/ImageObject">
   <img class="center-fit" src="tetrahedron.jpeg" alt="Tetrahedron">
   </figure>
+<br>
 <p itemprop="abstract" style="margin:12px">A tetrahedron is a pyramid with fixed proportions.<p>
 <p itemprop="description" style="margin:12px">It is bound by 4 equilateral triangles forming 6 equal edges.</p>
 <div style="margin:12px" itemprop="about" itemscope itemtype="https://schema.org/PropertyValue">