Pre-Algebra Examples



\begin{matrix} l = & 8 w = & 8 \end{matrix}

$\begin{array}{r} l = & 8 \\ w = & 8 \end{array}$

Step 1

The perimeter of a rectangle is equal to the sum of all sides of the rectangle.

l e n g t h + l e n g t h + w i d t h + w i d t h = 2 \cdot (l e n g t h) + 2 \cdot (w i d t h)

$l e n g t h + l e n g t h + w i d t h + w i d t h = 2 \cdot (l e n g t h) + 2 \cdot (w i d t h)$

Step 2

Substitute the values of the length

l = 8

$l = 8$ and width

w = 8

$w = 8$ into the formula for the perimeter of a rectangle.

2 \cdot 8 + 2 \cdot 8

$2 \cdot 8 + 2 \cdot 8$

Step 3

Simplify each term.

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Step 3.1

Multiply

2

$2$ by

8

$8$ .

16 + 2 \cdot 8

$16 + 2 \cdot 8$

Step 3.2

Multiply

2

$2$ by

8

$8$ .

16 + 16

$16 + 16$

16 + 16

$16 + 16$

Step 4

Add

16

$16$ and

16

$16$ .

32

$32$

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