Math(2)

1:
#include<stdio.h>
///***trapezium

int main(){
float b1,b2,h;
float area;
printf("Enter the size of two bases and height of the trapezium : ");
scanf("%f%f%f",&b1,&b2,&h);
area = 0.5 * ( b1 + b2 ) * h ;
printf("Area of trapezium is: %.2f",area);
return 0;
}

output:depend on your value

2:
#include<stdio.h>
#include<math.h>
///***equilateral triangle
int main(){

    float a;
    float area;
    printf("Enter size of side of the equilateral triangle : ");
    scanf("%f",&a);
    area = sqrt(3)/4*(a*a);
    printf("Area of equilateral triangle is: %.2f",area);
    return 0;
}



output:depend on your value

3:
 #include<stdio.h>
///***cube surface and volume
int main(){

    float a,surface,volume;
    printf("Enter size of any side of a cube : ");
    scanf("%f",&a);
    surface= 6 * (a * a);
    volume = a * a * a;
    printf("Surface area of cube is: %.2f",surface);
    printf("Volume of cube is : %.2f",volume);
    return 0;
}




output:depend on your value

3:
#include<stdio.h>
#define PI 3.141
///***perimeter of circle
    int main()
    {
    float r;
    printf("Enter the radius value:");
    scanf("%f",&r);
    printf("Area of circle : %.2f ", PI*r*r);
    printf("Perimeter of the circle : %.2f ", 2*PI*r);
    return 0;
    }