Pre-Algebra Examples



$\begin{array}{r} l = & 13 \\ w = & 5 \end{array}$

Step 1

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

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

Step 2

Substitute the values of the length

$l = 13$ and width

$w = 5$ into the formula for the perimeter of a rectangle.

$2 \cdot 13 + 2 \cdot 5$

Step 3

Simplify each term.

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Step 3.1

Multiply

$2$ by

$13$ .

$26 + 2 \cdot 5$

Step 3.2

Multiply

$2$ by

$5$ .

$26 + 10$

Step 4

Add

$26$ and

$10$ .

$36$

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