The perimeter of a rectangle is 80 cm. If the length is 22 cm, how wide is the rectangle?
A) First write an equation you can use to answer this question. Use w as your variable in the equation.
B) Solve your equation in part [A] to find the width of the rectangle.
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Perimeter = 80 cm (Given)
Length - 22 cm (Given)
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(A) Form the equation:
Perimeter = 2 (Length + Width)
Plug in the values of Perimeter and Length:
80 = 2 ( 22 + w)
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(B) Solve w:
80 = 2 ( 22 + w)
Divide by 2 :
40 = 22 + w
Subtract 22 from both sides:
w = 18 cm
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Answer: (A) Equation: 80 = 2 ( 22 + w) (B) width = 18 cm
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