no add the sides of the area
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If you are calculating the area of a rectangle, it is length times width. You are not multiplying all the sides, because there are four sides. You only need to multiply two of them.
to find the perimeter you must add all sides. and to find area you have to multiply lenght and width
20cm daftie!! ^No, 25cm² actually. All you do is multiply 5 by 5.
Multiply the sides
multiply all of the sides than that is your answer