All areas in cpp

 #include<iostream>

#include<conio.h>

#include<math.h>

using namespace std;

int main()

{

int radius;

float apothem,perimeter,area,base,height;

cout<<"________________________________________________________________________"<<endl;

cout<<"________________________________________________________________________"<<endl;

cout<<"                TO FIND THE AREA OF CIRCLE :"<<endl;

cout<<"\nEnter the radius of circle:"<<ends;

cin>>radius;

area = 3.14*radius*radius;

cout<<"\n Area of circle: "<<area;

getch();

cout<<"\n________________________________________________________________________"<<endl;

cout<<"________________________________________________________________________"<<endl;

cout<<"\n\n            TO FIND THE AREA OF TRIANGLE:"<<endl;

cout<<"\nEnter the base: ";

cin>>base;

cout<<"\nEnter the haight: ";

cin>>height;

area=0.5*base*height;

cout<<"\nArea of triangle : "<<area;

getch();

cout<<"\n________________________________________________________________________"<<endl;

cout<<"________________________________________________________________________"<<endl;

cout<<"\n\n            TO FIND THE AREA OF EQULATERAL TRIAGLE:"<<endl;

cout<<"Length of side is : ";

cin>>base;

area=(float)(sqrt(3)*(base*base))/4;

cout<<"\nArea of Equilateral Triangle is : "<<area;

getch();

cout<<"\n________________________________________________________________________"<<endl;

cout<<"________________________________________________________________________"<<endl;

cout<<"\n\n                 TO FIND THE AREA OF RECTANGLE :"<<endl;

cout<<"\nEnter the length  of rectangle :";

cin>>base;

cout<<"\nEnter the breadth of rectangle :";

cin>>height;

area=base*height;

cout<<"\nArea of rectangle is :"<<area;

getch();

cout<<"\n________________________________________________________________________"<<endl;

cout<<"________________________________________________________________________"<<endl;

cout<<"\n\n                 TO FIND THE AREA OF SQUARE :"<<endl;

cout<<"\nEnter the side of square :";

cin>>base;

area=base*base;

cout<<"\nArea of square is :"<<area;

getch();

cout<<"\n________________________________________________________________________"<<endl;

cout<<"________________________________________________________________________"<<endl;

cout<<"\n\n                 TO FIND THE AREA OF RHOMBUS :"<<endl;

cout<<"\nEnter the values of diagonal :"<<ends;

cin>>base>>height;

area=(base*height)/2;

cout<<"\nArea of rhombus is : "<<area;

getch();

cout<<"\n________________________________________________________________________"<<endl;

cout<<"________________________________________________________________________"<<endl;

cout<<"\n\n                TO FIND THE AREA OF PENTAGON :"<<endl;

cout<<"\nEnter the length of side of pentagon :";

cin>>base;

area=(sqrt(5*(5+2*sqrt(5))) * (base*base))/4;

cout<<"\nArea of Regular pentagon is : "<<area;

getch();

cout<<"\n________________________________________________________________________"<<endl;

cout<<"________________________________________________________________________"<<endl;

cout<<"\n\n               TO FIND THE AREA OF HEXAGON :"<<endl;

cout<<"\nEnter the length of side of hexagon : ";

cin>>base;

area=(3*sqrt(3)*base*base)/2;

cout<<"\nArea of Regular hexagon is : "<<area;

getch();

cout<<"\n________________________________________________________________________"<<endl;

cout<<"________________________________________________________________________"<<endl;

cout<<"\n\n              TO FIND THE AREA OF HEPTAGON :"<<endl;

cout<<"\nEnter the value of side of heptagon :";

cin>>base;

cout<<"\nEnter the value of apothem :";

cin>>apothem;

perimeter=7*base;

area=(perimeter*apothem)/2;

cout<<"\nArea of Regular heptagon : "<<area;

getch();

cout<<"\n________________________________________________________________________"<<endl;

cout<<"________________________________________________________________________"<<endl;

cout<<"\n\n             TO FIND THE AREA OF OCTAGON :"<<endl;

cout<<"\nEnter the length of side of octagon : ";

cin>>base;

area=2*(1+sqrt(2))*base*base;

cout<<"\n Area of octagon is : "<<area;

getch();

cout<<"\n________________________________________________________________________"<<endl;

cout<<"________________________________________________________________________"<<endl;

cout<<"\n\n            TO FIND THE AREA OF TRAPEZOID :"<<endl;

cout<<"\nEnter the value of bases : "<<endl;

cin>>base>>radius;

cout<<"\nEnter the value of height : ";

cin>>height;

area=(float)((base*radius)*height)/2;

cout<<"\nArea of Trapezoid is :"<<area;

getch();

cout<<"\n............................END............................................";

return 0;

}