To find the perimeter of a rectangle, you use the formula:

$P = 2 \times (\text{length} + \text{width})$

From the image, the length of the rectangle is 4 cm, and the width is 1.5 cm. Now, we can calculate the perimeter:

$P = 2 \times (4 + 1.5) = 2 \times 5.5 = 11 \, \text{cm}$

The perimeter of the rectangle is 11 cm.

Would you like more details or have any questions?

Here are 5 related questions to expand on this concept:

1. How do you calculate the area of the rectangle with the given dimensions?
2. What would the perimeter be if the length and width were doubled?
3. Can you calculate the diagonal of this rectangle using the Pythagorean theorem?
4. How does the perimeter formula change for other polygons, like a square or triangle?
5. What real-world objects can be modeled as rectangles, and why is knowing the perimeter useful?

Tip: For any rectangle, the perimeter is simply twice the sum of its length and width!