How to find the missing side length of a parallelogram?
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If you chose xy+7x+12y+84, you multiplied the two sides to find the area.
If you chose x+y+19, you only added two sides. Perimeter involves all 4 sides; so double the width and length.
Just remember, the width is 12 added to x. Not 12 times the side of x.
If you chose x+y+19, you only added two sides. Perimeter involves all 4 sides; so double the width and length.
Just remember, the width is 12 added to x. Not 12 times the side of x.
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