For a pdf file of this image, click here
Go to the following link which will give you a better understanding of a rectangle.
Click on the following link: http://www.mathopenref.com/
Follow the following paths:
Plane Geometry > Quadrilaterals > Rectangles
Plane Geometry > Quadrilaterals > Rectangle definition
Plane Geometry > Quadrilaterals > Area of a Rectangle
Plane Geometry > Quadrilaterals > Perimeter of a Rectangle
Plane Geometry > Quadrilaterals > Diagonals of a Rectangle
Plane Geometry > Quadrilaterals > The Golden rectangle
Plane Geometry > Quadrilaterals > The International paper size rectangle
Follow the following paths:
Plane Geometry > Quadrilaterals > Rectangles
Plane Geometry > Quadrilaterals > Rectangle definition
Plane Geometry > Quadrilaterals > Area of a Rectangle
Plane Geometry > Quadrilaterals > Perimeter of a Rectangle
Plane Geometry > Quadrilaterals > Diagonals of a Rectangle
Plane Geometry > Quadrilaterals > The Golden rectangle
Plane Geometry > Quadrilaterals > The International paper size rectangle