Update index.html

accessMode

Author: Gmac4247

index.html

@@ -676,7 +676,8 @@ <h3 style="margin:7px">Volume of a Cube</h3>
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 <meta itemprop="accessibilitySummary" content="Equations with figures and explanations">
-<meta itemprop="accessMode" content="textual visual">
+<meta itemprop="accessMode" content="textual">
+<meta itemprop="accessMode" content="visual">
 <meta itemprop="isAccessibleForFree" content="true">
 <meta itemprop="isFamilyFriendly" content="true">
 <meta itemprop="keywords" content="exact area of a triangle, a regular polygon, a circle, a circle segment and surface of a cone; exact volume of a sphere, a spherical cap, a cone, a pyramid and a frustum">