Frank draws a square that measures 3 inches on each side. Then, he dilates the square using a scale factor of 1.5. What is the area of the dilated square?

1 answer

To find the area of the dilated square, we first need to determine the dimensions of the original square and then calculate the dimensions after dilation.

  1. Original Square: The side length of the original square is 3 inches.

  2. Area of the Original Square: The area \( A \) of a square is given by the formula: \[ A = \text{side length}^2 \] Thus, the area of the original square is: \[ A = 3^2 = 9 \text{ square inches} \]

  3. Dilation: Frank dilates the square with a scale factor of 1.5. The new side length \( s' \) of the dilated square is calculated as follows: \[ s' = \text{original side length} \times \text{scale factor} = 3 \text{ inches} \times 1.5 = 4.5 \text{ inches} \]

  4. Area of the Dilated Square: Now, we can calculate the area of the dilated square with the new side length: \[ A' = (s')^2 = (4.5)^2 \] Calculating \( (4.5)^2 \): \[ (4.5)^2 = 20.25 \text{ square inches} \]

Thus, the area of the dilated square is \(\boxed{20.25}\) square inches.