Update index.html

Fancying

Author: Gmac4247

index.html

@@ -3106,7 +3106,6 @@ <h3 style="margin:7px;">The circumference of a circle can be derived from its ar
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   <summary><h4 style="margin:7px">While the approximate value of 3.14159…, commonly denoted by the Greek letter π, is widely recognized today, the historical development of this concept is less understood.</h4></summary>
@@ -3386,6 +3385,7 @@ <h3 style="margin:7px;">The volume of a sphere is defined by comparing it to a c
 <strong style="margin:12px;">The edge length of the cube, which has the same volume as the sphere, equals the square root of the area of the square that has the same area as the sphere's cross-section.</strong>
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   <summary><h4 style="margin:7px">The " V = 4 / 3 × π × radius³ " formula is widely used for the volume of a sphere.</h4></summary>