**What is meant by quadrilateral?**

A shape which has four straight sides is called quadrilateral shape

**What is meant by Rectangle or Parallelogram?**

Such a quadrilateral which has four right angles (angle 90 Degree) triangle is called rectangle

**Formula: **

`Area of rectangle: height*width`

`Perimeter of rectangle: 2*(height+width)`

### C++ Program

#include<iostream> using namespace std; int main() { int width,height,area,perimeter; cout<<"Enter Width of Rectangle = "; cin>>width; cout<<"Enter Height of Rectangle = "; cin>>height; area=height*width; cout<<"Area of Rectangle ="<<area<<endl; perimeter=2*(height+width); cout<<" Perimeter of rectangle are = "<<perimeter<<endl; return 0; }