php man page for hypot

HYPOT(3)								 1								  HYPOT(3)

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

SYNOPSIS
       float hypot (float  $x, float  $y)

DESCRIPTION
       hypot(3)  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).

PARAMETERS
	      o $x
		- Length of first side

	      o $y
		- Length of second side

RETURN VALUES
	Calculated length of the hypotenuse

PHP Documentation Group 														  HYPOT(3)