Perimeter is most often found by adding.
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Multiply for the area, add for the perimeter.
to find the perimeter you must add all sides. and to find area you have to multiply lenght and width
No, you add up all the sides. Yes, in terms of a circle. To determine the perimeter or circumference of a circle, you must multiply: 2πr or two times Pi times the radius of the circle.
Add the two known measurements together, then multiply by 2 - and you'll have your answer !
Perimeter: Add the length of the four sides. Area: Multiply length x width.