Write a C program to find the Area and perimeter of a. Circle Input: r (radius) b. Square Input: a (length of side) c. Triangle Inputs: a, b, c (a, b, c are 3 sides of a triangle) d. Rectangle Input: l, b (l=length & b= breadth) e. Ellipse Input: a, b (a=major axes, b=minor axes)

#include <stdio.h>            //This is include information about standard library
#include <math.h>            //math function includes about math commands
main()                    //User define function
{

//circle
float pi=3.14,r,a,b,c;            //Float funcion which takes all float values
printf("Enter the value for r: ");    //which asks the user input
scanf("%f",&r);                //which attach the user input to r variable
a=pow(r,2);                //a variable equals to r sqare using pow function
b=pi*a;                    //formula for circle area
c=2*pi*r;                //formula for circle perimeter
printf("Circle area :%f\n",b);        //printing circle area
printf("perimeter :%f\n",c);        //printing circle perimeter


//square
float d,e,f;                //Float funcion which takes all float values
printf("Enter the value for a: ");    //which asks the user input
scanf("%f",&d);                //which attach the user input to a variable
e=pow(d,2);                //formula for area of square
f=4*d;                    //formula for perimeter of square
printf("Square area :%f\n",e);        //prints area of square
printf("Square perimeter :%f\n",f);    //prints perimeter of square


//triangle
float g,h,i,j,k,l;                //Float funcion which takes all float values
printf("Enter the value for side a: ");        //user input for side a
scanf("%f",&g);                    //which attaches the user input to a variable a
printf("Enter the value for side b: ");        //user input for side b
scanf("%f",&h);                    //which attaches the user input to a variable b
printf("Enter the value for side c: ");        //user input for side c
scanf("%f",&i);                    //which attaches the user input to a variable c
l=(g+h+i)/2;                   
j=sqrt(l*(l-g)*(l-h)*(l-i));            //formula for triangle area
printf("Triangle area :%f\n",j);        //printing the triangle area
k=g+h+i;                        //formula for triangle perimeter
printf("Triangle perimeter :%f\n",k);        //printing the triangle perimeter


//rectangle
float m,n,o,p;                    //Float funcion which takes all float values
printf("Enter the value for length l: ");    //which takes the valuse for length from user input
scanf("%f",&m);                    //which attaches the user input to variable l
printf("Enter the value for bredth b: ");    //which takes the valuse for bredths from user input
scanf("%f",&n);                    //which attaches the user input to variable b
o=m*n;                        //formula for rectangle area
p=2*(m+n);                    //formula for rectangle perimeter
printf("Rectangle area :%f\n",o);        //prints rectangle area
printf("perimeter :%f\n",p);            //prints rectangle perimeter


//ellipse
float u=3.14,q,v,s,t;                //Float funcion which takes all float values
printf("Enter the value for major axis a: ");    //which takes value for the major axis from the userinput
scanf("%f",&q);                    //which attach the user input to a variable a
printf("Enter the value for minor axis b: ");    //which asks the user input for the minor axis
scanf("%f",&v);                    //which attach the user input to a variable b
s=u*q*v;                    //formula for Ellipse area
t=2*u*sqrt((pow(q,2)+pow(v,2))/2);        //formula for Ellipse perimeter
printf("Ellipse area :%f\n",s);            //printing Ellipse area
printf("Ellipse perimeter :%f\n",t);        //printing Ellipse perimeter
}