If we prove that the area of a unit square is equal to 1. First a rectangle of width w and length l can be divided into w x l unit squares. To get the total area just add these areas together.
The area of this rectangle is b h However if we draw a diagonal from one vertex it will break the rectangle into two congruent or equal triangles.
Thus the area of ABCD will be. 15 4 60. The area of the rectangle is b 1 h but the area of the triangles with base x and y are. Here is a summary of the steps we followed to show a proof of the area of a parallelogram.