function allLength($xA, $yA, $xB, $yB, $xC, $yC)
{
$a = abs(Leng($xA, $xB, $yA, $yB));
$b = abs(Leng($xB, $xC, $yB, $yC));
$c = abs(Leng($xA, $xC, $yA, $yC));
$len = array('a' => $a, 'b' => $b, 'c' => $c);
$var = Perim($len);
$result = array('perimeter' => $var, 'length' => $len);
return $result;
}
<head>
<title>56</title>
</head>
<?php
/**
* Write a real-valued function Leng(xA, yA, xB, yB) that returns the
* length of a segment AB with given coordinates of its endpoints:
* |AB| = ((xA − xB)2 + (yA − yB)2)1/2
* (xA, yA, xB, yB are real-valued parameters). Using this function,
* find the lengths of segments AB, AC, AD provided that coordinates of points A, B, C, D are given.
*/
//number_format(2.23665865, 3, ',', ' ')
function Leng($xA, $xB, $yA, $yB)
{
$a = pow($xA - $xB, 2);
//var_dump($a);
$b = pow($yA - $yB, 2);
//var_dump($b);
$result = pow($a + $b, 1 / 2);
if (!(ceil($result) == $result)) {
$result = number_format($result, 3, '.', ' ');
}
return $result;
}
echo Leng(6, 2, 4, 1) . '<br/>';
echo Leng(7, 1, 3, 1) . '<br/>';
echo Leng(10, 0, 10, 0) . '<br/>';