Update about.html

Author: Gmac4247

about.html

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 <h1 style="font-size:160%;margin:7px">About the Core Geometric System ™</h1>
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 <h2 style="margin:12px">Once around 2018 I was wondering how to calculate the area of a circle.</h2>
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+<section itemscope itemtype="http://schema.org/Article">
 <section><h2 itemrel="description" style="margin:12px">I remembered the number 3.14 called the pi, but I was interested in the logic of comparing the circle to a square.</h2>
 <p style="margin:12px">Because the square is the basis of area calculation. That is why we use square units. 
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@@ -210,7 +211,7 @@ <h2 itemrel="description" style="margin:12px">In early 2020 there were news abou
 <iframe title="Introduction to basic geometry" width="420" height="315" src="https://youtube.com/embed/U5eHkmmVVEA"></iframe>
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-<p itemrel="description" style="margin:12px">Exactly determining the properties of different shapes is in the scope.</div>
+<p itemrel="description" style="margin:12px">Exactly determining the properties of different shapes is in the scope.</p>
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 <h2 style="margin:12px" itemrel="description">I named my framework the Core Geometric System ™ and put the trademark symbol on it to indicate that this not just another abstract geometric system.</h2>
@@ -268,6 +269,7 @@ <h2 style="margin:12px" itemrel="description">While trying to explain it to othe
 Thank you for reading this and thanks to everyone making it possible.
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