math parallelogram

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Area of the parallelogram

The area of a parallelogram is b ?h, where b is the length of the 
base of the parallelogram, and h is the corresponding height. To 
picture this, consider the parallelogram below:

       ___________________________
      /|                         /
     / |                        / 
    /  |  h                    /
   /   |                      /
   ---------------------------
  |<------------B----------->|

Example: 

What is the area of a parallelogram having a base of 20 and a 
corresponding height of 7?

The area is the product of a base and its corresponding height, 
which is 20 ?7 = 140. 


Perimeter of the parallelogram


The perimeter of a parallelogram is the distance around the outside 
of the parallelogram. A parallelogram has four sides with opposite 
sides being congruent. The formula for finding the perimeter is 
Side A + Side B + Side A + Side B. This could also be stated as 
2*Side A + 2*Side B or 2*(Side A + Side B). 

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