Update index.html

Fix

Author: Gmac4247

index.html

@@ -2575,7 +2575,7 @@ <h4>Archimedes and the Illusion of Limits</h4>
 <br><br>
 Archimedes approximated the circumference of a circle using inscribed and circumscribed polygons.  
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-He began with a hexagon — not the minimal 3‑ or 4‑gon — because the hexagon is both easy to construct and already close to the circle.  
+He began with a hexagon because the hexagon is both easy to construct and already close to the circle.  
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 By repeatedly bisecting the angles, he produced 12‑gons, 24‑gons, and eventually a 96‑gon.  
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@@ -2596,7 +2596,7 @@ <h4>Archimedes and the Illusion of Limits</h4>
       <li>the right triangle</li>
       <li>the equilateral triangle</li>
       <li>the isosceles right triangle</li>
-      <li>the 30–60–90 triangle°</li>
+      <li>the 30°–60°–90° triangle</li>
 </ul>  
 <br>
 <p>For these angles, the identity