find the surface area of a regular polygon circumscribed around a cylinder in php

main.php
<?php
// set the number of sides of the regular polygon
$numSides = 6;

// set the radius of the cylinder
$radius = 10;

// calculate the height of the cylinder
$height = 2 * $radius;

// calculate the circumference of the base of the cylinder
$circumference = 2 * M_PI * $radius;

// calculate the side length of the regular polygon
$sideLength = $circumference / $numSides;

// calculate the area of one side of the regular polygon
$triangleArea = pow($sideLength, 2) * sqrt(3) / 4;

// calculate the total area of the regular polygon
$polygonArea = $triangleArea * $numSides;

// calculate the area of the curved surface of the cylinder
$curvedSurfaceArea = $circumference * $height;

// calculate the total surface area
$surfaceArea = $curvedSurfaceArea + $polygonArea;

// print the result
echo "The surface area is: " . $surfaceArea;
?>
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main.php
The surface area is: 1179.1159400726
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