Basic Math Examples

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\begin{matrix} l = & 3 w = & 5 \end{matrix}

$\begin{array}{r} l = & 3 \\ w = & 5 \end{array}$

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)

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

Step 2

Substitute the values of the length

l = 3

$l = 3$ and width

w = 5

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

2 \cdot 3 + 2 \cdot 5

$2 \cdot 3 + 2 \cdot 5$

Step 3

Simplify each term.

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Step 3.1

Multiply

2

$2$ by

3

$3$ .

6 + 2 \cdot 5

$6 + 2 \cdot 5$

Step 3.2

Multiply

2

$2$ by

5

$5$ .

6 + 10

$6 + 10$

6 + 10

$6 + 10$

Step 4

Add

6

$6$ and

10

$10$ .

16

$16$

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