Dear Monks,

I am trying to make an "all-in-one area calculator" for my brother to help him with his homework. I thought it would be an easy task. The problem I have is, when it asks "What kind of shape am I working with?", and I say "rectangle", it starts printing the things it is supposed to print when I type in "square". Note: The code is below. All of the scalars at the top are not needed, I just put them there to refer to.

Oh, and I know I might not have been to clear so if you have questions please ask.

use 5.12.4;
use Math::Trig;
use strict;
######################################################################
+#####
my $square_side= shift;  ##SQUARE AREA FORMULA
my $square_area= $square_side*2;
######################################################################
+#####
my $rectangle_side=shift;  ##RECTANGLE AREA FORMULA
my $rectangle_side_2=shift;
my $rectangle_area = $rectangle_side*$rectangle_side_2;
######################################################################
+#####
my $paralellogram_base=shift;  ##PARALELLOGRAM AREA FORMULA
my $paralellogram_height= shift;
my $paralellogram_area=$paralellogram_base*$paralellogram_height;
######################################################################
+#####
my $trapezoid_base=shift;  ##TRAPEZOID AREA FORMULA
my $trapezoid_base_2=shift;
my $trapezoid_height=shift;
my $trapezoid_area=$trapezoid_height/2*($trapezoid_base*$trapezoid_bas
+e_2);
######################################################################
+#####
my $circle_radius=shift;  ##CIRCLE AREA FORMULA
my $pi=pi;
my $circle_area=$pi*($circle_radius**2);
######################################################################
+######
my $triangle_base=shift; ##NON-EQUALATERAL TRIANGLE FORMULA
my $triangle_height=shift;
my $triangle_area=.5*($triangle_base*$triangle_height);
######################################################################
+######

say "I am an area calculator. I can calculate the area of most basic s
+hapes (mostly).\n";
say "\nWhat type of shape am I working with?\n";

my $type=<>;
chomp ($type);
while ($type){
if ($type eq 'square' or 'Square'){
    say "Okay. I am working with a $type.\n";
    say "ENTER SIDE LENGTH";
    $square_side= <>;
    my $square_area= $square_side*2;
    say "ANSWER=  $square_area";
    last;
}}
while ($type){
if ($type eq 'rectangle' or 'Rectangle'){
    say "Okay. I am working with a $type.\n";
    say "ENTER FIRST SIDE LENGTH";
    $rectangle_side=<>;
    say "ENTER SECOND SIDE LENGTH";
        $rectangle_side_2=<>;
    say "ANSWER=  $rectangle_area";
    last;}}

while ($type){
if ($type eq 'paralellogram' or 'Paralellogram'){
    say "Okay. I am working with a $type.\n";
    say "ENTER BASE";
    $paralellogram_base=shift;
    say "ENTER HEIGHT";
    $paralellogram_height= shift;
        say "ANSWER=  $paralellogram_area";
    last;}}
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