Руководство по PHP
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# hypot

(PHP 4 >= 4.1.0, PHP 5)

hypot -- Calculate the length of the hypotenuse of a right-angle triangle

## Description

float hypot ( float x, float y )

hypot() returns the length of the hypotenuse of a right-angle triangle with sides of length x and y, or the distance of the point (x, y) from the origin. This is equivalent to sqrt(x*x + y*y).

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hexdec | Уровень выше | is_finite