find perimeter, if length is twice width, area is 200
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rddlkmbrly
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find perimeter, if length is twice width, area is 200
what is the formula to find the perimeter of a rectangle: the length is twice it's width and the area is 200 ft sq.
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stapel_eliz
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"The formula" is what you need to come up with!what is the formula to find the perimeter of a rectangle: the length is twice it's width and the area is 200 ft sq.
Since length is defined in terms of width, pick a variable for the width. Then translate the relationship of "the length is twice the width" into a mathematical expression.
Take the geometrical formula for the area "A" of a rectangle with width "w" and length "L", and plug your variable, your expression, and the given value for A into this formula.
Solve for the width. Back-solve for the length. Then plug these values into the formula for the perimeter P of a rectangle with width w and length L.
If you get stuck, please reply showing how far you have gotten. Thank you!
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wibblyangelica
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