Question

I need help surface area

Answer 1

`\huge\boxed{318yd^2}`

Explanation:

The object shown in the diagram is a triangular prism, which contains two triangular sides and three rectangular sides.

The area of a triangle is simply
`(bh)/(2)`.

Because the triangles are both the same, you may multiply the equation by 2 to get simply bh, or 9 * 6, or 54.

Then, simply solve for the areas of each rectangle:

r1 = 11 * 7 = 77

r2 = 11 * 8 = 88

r3 = 11 * 9 = 99.

Then, simply add all the values to get:

99 + 88 + 77 + 54

318.

Hope it helps :) and let me know if you want me to elaborate.