Update index.html

Author: Gmac4247

index.html

@@ -2443,8 +2443,6 @@ <h6 style="font-size:160%;margin:7px;">Area of a regular polygon</h6>
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 Just as the volume of a cube equals the cubic value of the square root of its cross sectional area, also the volume of a sphere equals the cubic value of the square root of its cross sectional area.
 </p>
-<br>
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  <mi>V</mi>
@@ -2728,7 +2726,7 @@ <h6 style="font-size:160%;margin:7px;">Area of a regular polygon</h6>
 <p style="margin:12px;">The slant height of the quarter unit cone is √2 × radius.
 </p>
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-<p style="margin:12px;">The volume of a quarter cylinder with the same base, and height equal to the slant height of the cone would be 
+<p style="margin:12px;">The volume of a quarter cylinder with the same base, and height equal to the slant height of the cone would be: 
 </p>
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@@ -3136,7 +3134,7 @@ <h6 style="font-size:160%;margin:7px;">Area of a regular polygon</h6>
   </div>
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 <p style="margin:12px;">The volume of a pyramid can be calculated 
-with the same coefficient as the volume of a cone:
+with the same coefficient as the volume of a cone.
 </p>
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 <math style="margin:12px;" xmlns="http://www.w3.org/1998/Math/MathML">