Questions: Perimeter: inches

Transcript text: Perimeter: $\qquad$ inches

Solution

Step 1: Identify the dimensions of the rectangle

The given dimensions of the rectangle are 12 inches (length) and 9 inches (width).

Step 2: Recall the formula for the perimeter of a rectangle

The formula for the perimeter $ P $ of a rectangle is: \[ P = 2 \times (\text{length} + \text{width}) \]

Step 3: Substitute the given dimensions into the formula

Substitute the length (12 inches) and width (9 inches) into the formula: \[ P = 2 \times (12 + 9) \]

Step 4: Perform the addition inside the parentheses

Calculate the sum of the length and width: \[ 12 + 9 = 21 \]

Step 5: Multiply by 2 to find the perimeter

Multiply the sum by 2 to get the perimeter: \[ P = 2 \times 21 = 42 \]

The perimeter of the rectangle is 42 inches.

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