To find the area of a triangle, you can use the formula:
\[ \text{Area} = \frac{1}{2} \times \text{base} \times \text{height} \]
In this case, the height of the triangle is given as 15 cm and the base is given as 2.5 cm. Plugging in these values:
\[ \text{Area} = \frac{1}{2} \times 2.5 , \text{cm} \times 15 , \text{cm} \]
Calculating this:
\[ \text{Area} = \frac{1}{2} \times 2.5 \times 15 = \frac{1}{2} \times 37.5 = 18.75 , \text{square centimeters} \]
So, the area of the triangle is 18.75 square centimeters.