The area \( A \) of a triangle can be calculated using the formula:
\[ A = \frac{1}{2} \times \text{base} \times \text{height} \]
In this case, the base is 13 yards and the height is 5 yards. Plugging these values into the formula gives:
\[ A = \frac{1}{2} \times 13 \times 5 \]
Now, calculate it step by step:
- Multiply the base and height: \( 13 \times 5 = 65 \)
- Now, multiply by \( \frac{1}{2} \):
\[ A = \frac{1}{2} \times 65 = 32.5 \]
So, the area of the triangle is 32.5 square yards.