// Created by Muhammad Musa #include #include #include using namespace std; int main(){ double r, b, h, e, f, l, n, perimeter, area, circumference, diameter; int a=2; int attempts = 0; double pi = 3.142; cout<<"what do you want to find? \n 1.perimeter of a square \n 2.area of a square \n 3.perimeter of a rectangle \n 4.area of a rectangle \n 5.perimeter of a parallelogram \n 6.area of a parallelogram \n 7.perimeter of a triangle \n 8.area of a triangle \n 9.perimeter of a trapezium \n 10.area of a trapezium \n 11.circumference of a circle \n 12.diameter of a circle "<< endl; cin>>n; while(attempts<3) { if (n==1){ cout<<"enter the length "<< endl; cin>>l; perimeter = 4*l; cout<<"perimeter of a square = "<< perimeter<<"cm"<< endl; break; } else if (n==2){ cout<<"enter the length & breadth "<< endl; cin>>l; area = l*l; cout<<"area of a square = "<>l>>b; perimeter = a*(l+b); cout<<"perimeter of a rectangle = "<< perimeter <<"cm"<< endl; break; } else if (n==4){ cout<<"enter the length & breadth "<< endl; cin>>l>>b; area = l*b; cout<<"area of a rectangle = "<>l>>b; perimeter = a*l+a*b; cout<<"perimeter of a parallelogram = "<>b>>h; area = b*h; cout<<"area of a parallelogram = "<>b>>e>>f; perimeter = b+e+f; cout<<"perimeter of a triangle = "<>b>>h; area = 0.5*(b*h); cout<<"area of a triangle = "<>l>>b>>e>>f; perimeter = l+b+e+f; cout<<"perimeter of a trapezium = "<>a>>b>>h; area = 0.5*(a*b)*h; cout<<"area of a trapezium = "<>r; circumference = a*pi*r; cout<<"circumference of a circle is "<>r; diameter = 2*r; cout<<"the diameter is "<

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