You have to multiply to find area you have to add to find perimiter
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if you multiply mathematically you find the area and adding is perimeter hope this helped you all.
To find the area of a rectangle, you multiply the length by the width. The formula for calculating the area of a rectangle is A = l x w, where A represents the area, l is the length, and w is the width. Multiplication is used because area is a two-dimensional measurement that requires combining two linear measurements.
you are suppose to MULTIPLY on area.
Add.
for area you times width x length
To find the perimeter you add and to find the area we multiply.
To calculate the area you multiply the width times lenghth.the numbers that are on the side of the shape multiply them and you'll get the area. Now to get the perimeter you add the numbers on the sides together. Add lenght times width.that's how you get your perimter and area.