#include<stdio.h>
#include<conio.h>
void main()
{
float a,c,r,p,l,b;
int ch;
clrscr();
printf("1. find the area and circumfrence of a circle");
printf("\n2. find area of triangle");
printf("\n3. find area of rectangle\n");
scanf("%d",&ch);
switch(ch)
{
case 1:
{
printf("\nenter the value of r");
scanf("%f",&r);
a=3.14*r*r;
c=2*3.14*r;
printf("\nthe area of circle %f",a);
printf("\nthe circumference of %f",c);
break;
}
case 2:
{
printf("\nenter the base and parimeter of triangle");
scanf("%f%f",&b,&p);
a=(b*p)/2;
printf("\narea of triangle %f",a);
break;
}
case 3:
{
printf("enter the length,bredth of rectangle");
scanf("%f%f",&l,&b);
a=l*b;
printf("area of rectangle %f",a);
break;
}
}
getche();
}
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