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. Substituting these values into the formula gives:
\[ A = \frac{1}{2} \times 13 \times 5 \]
Calculating it step-by-step:
- Multiply the base by the height: \( 13 \times 5 = 65 \)
- Divide by 2: \( \frac{65}{2} = 32.5 \)
Therefore, the area of the triangle is:
\[ 32.5 \text{ square yards} \]
So, the correct response is:
32.5 square yards