Answer:
[tex]390ft^2\\[/tex]
Step-by-step explanation:
Ok so we have 2 (congruent) triangles and 3 rectangles.
Your main approach to this problem should be to find the area of each of the faces and adding them up to get to your final answer. Your question makes a point of including the correct unit in your answer. Since this is surface area, the unit would be [tex]ft^2[/tex]
Now let's start:
First, I am going to start with finding the area of the rectangles.
[tex]12\cdot11=132\\13\cdot11=143\\5\cdot11=55\\\\55+143+132=330[/tex]
Alright, next lets move on to the triangles.
They are both the same, if you notice. So find one and double it.
[tex]12\cdot5=60\\\frac{60}{2}=30\\30\cdot2=60[/tex]
now lets add em all
330+60
= 390 and thats your final answer, dont forget to include the unit, ft^2
