<?php
fscanf(STDIN, "%f %f %f", $a, $b, $c);
$AreaRectangledTriangle = ($a*$c)/2;
$AreaRadiusCircle = 3.14159*$c**2;
$AreaTrapezium = (($a+$b)*$c)/2;
$AreaSquare = $b**2;
$AreaRectangle = $a*$b;
printf("TRIANGULO: %.3f\nCIRCULO: %.3f\nTRAPEZIO: %.3f\nQUADRADO: %.3f\nRETANGULO: %.3f\n", $AreaRectangledTriangle, $AreaRadiusCircle, $AreaTrapezium, $AreaSquare, $AreaRectangle);
?>