Answer:
416 yd^2
Step-by-step explanation:
The formula for the surface area of a triangular prism is
[tex]A=2\sqrt{\frac{a+b+c}{2}(\frac{a+b+c}{2}-a)(\frac{a+b+c}{2}-b)(\frac{a+b+c}{2}-c)}+(a+b+c)h[/tex]
where h is the height (10), and a, b and c are the base sides (10, 10, 12).
