An official authorization or approval from a professional organization of society that indicates that a person has met certain performance standards iscalled <span>licensing.</span>
In a 30°-60°-90° triangle, the sides occur in a ratio of 1 to √3 to 2. In this case, <em>x</em> is half the length of the hypotenuse, so <em>x</em> = 4.
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