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If you have an n-sided polygon in 2-dimensional space an nx2 array, with each column consisting of the coordinates of a vertex, will represent the polygon. In 3-dimensional space you will need a nx3 matrix. Once you have the coordinates of the vertices you can use appropriate formulae to calculate the side lengths, angles, etc.

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Q: How can you use an array to find a shape?
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How do you find the size of an array in PHP?

To find the size of an array in PHP you can either use the count() function or the sizeof() function as they will produce the same result. <?php $array = array(1, 2, 3, 4, 5, 6, 7); echo count($array); // outputs 7 echo sizeof($array); // outputs 7 ?>


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