Pre-Algebra Examples



\begin{array}{r} l = & 1 \\ w = & 1 \end{array}

$\begin{array}{r} l = & 1 \\ w = & 1 \end{array}$

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 = 1

$l = 1$ and width

w = 1

$w = 1$ into the formula for the perimeter of a rectangle.

2 \cdot 1 + 2 \cdot 1

$2 \cdot 1 + 2 \cdot 1$

Step 3

Simplify each term.

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Step 3.1

Multiply

2

$2$ by

1

$1$ .

2 + 2 \cdot 1

$2 + 2 \cdot 1$

Step 3.2

Multiply

2

$2$ by

1

$1$ .

2 + 2

$2 + 2$

2 + 2

$2 + 2$

Step 4

Add

2

$2$ and

2

$2$ .

4

$4$

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