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Big Ideas Math Geometry, 2014

BI

Big Ideas Math Geometry, 2014 View details

Maintaining Mathematical Proficiency

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Exercise 6 Page 591

Use the formula for the area of a rectangle.

12 feet

Practice makes perfect

To find the length of the rectangle we will use the formula for calculating the area of a rectangle. A=l * w We will substitute the given measurements, A = 84, and w=7, into the formula to calculate l.

A= l * w

A= 84, w= 7

84 = l * 7

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Solve for l

Rearrange equation

l * 7 = 84

.LHS /7.=.RHS /7.

l = 12

The length of the rectangle is 12 feet.

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Exercises p.591