Answer:
18.
Step-by-step explanation:
4yd is on the bottom.
9yd is on the left.
13yd is on the right.
The area for a triangle is [tex]\frac{1}{2} * b * h.[/tex] We add the numbers into the formula.
[tex]\frac{1}{2} *4*9 = 18.[/tex]
We do not use 13, because it is only going from one corner to the opposite corner. So, the answer is 18.
Hope this helped!
