The
perimeter is equal to the length of the boundary around the rectangle.

Perimeter
of rectangle = 2l+2w

Perimeter
of square = 4 * sides

**SOURCE CODE :-**

using System;

using
System.Collections.Generic;

using
System.Linq;

using
System.Text;

namespace perimeter

{

class peri

{

public void perime()

{

double
l_rectangle, b_rectangle;

double
p_rectangle;

double
sides;

double
p_square;

Console.WriteLine("enter the value of length and breadth of
rectangle");

l_rectangle = double.Parse(Console.ReadLine());

b_rectangle = double.Parse(Console.ReadLine());

Console.WriteLine("Enter the sides of the square");

sides = double.Parse(Console.ReadLine());

p_rectangle = 2 * l_rectangle + 2 *
b_rectangle;

p_square = 4 * sides;

Console.WriteLine("the perimeter of rectangle" +
p_rectangle);

Console.WriteLine("the perimeter of square" + p_square);

}

}

class Program

{

static void Main(string[]
args)

{

peri
b = new peri();

b.perime();

}

}

}

**OUTPUT :-**

enter the value of
length and breadth of rectangle

3

3

Enter the sides of
the square

5

the perimeter of
rectangle 12

the perimeter of
square 16

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