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hypot
(PHP 4 >= 4.1.0, PHP 5) hypot --
Calculate the length of the hypotenuse of a right-angle triangle
Descriptionfloat 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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