To calculate the area of this parallelogram, we use the formula for the area of a parallelogram:

$\text{Area} = \text{base} \times \text{height}$

From the image:

• The base of the parallelogram is $15 \, \text{cm}$ (the side adjacent to the height).
• The height is $9 \, \text{cm}$ (the perpendicular distance from the base).

Now, calculating the area:

$\text{Area} = 15 \, \text{cm} \times 9 \, \text{cm} = 135 \, \text{cm}^2$

Thus, the area of the parallelogram is 135 cm².

Would you like a detailed explanation or have any questions? Here are some related questions to further expand on this:

1. How do you find the area of a parallelogram if the height is not given?
2. Can you find the area of a triangle if you know the base and height?
3. What is the difference between finding the area of a rectangle and a parallelogram?
4. How do you calculate the perimeter of a parallelogram?
5. How can you find the height of a parallelogram if the area and base are known?

Tip: For any parallelogram, the height is always perpendicular to the base, even if it appears slanted.