Answer:
C
Step-by-step explanation:
5*5=25
5*5.6=28
28*2=56
56+25=81
Answer:
C.) 81
Step-by-step explanation:
To find surface area, simply add the area of the faces of a shape, this shape has exactly 5 faces, 4 of which are triangles, the square should be the easiest to find the area of so let's start off with that!
The square has a side length of 5, to find the area of course, you square the side lengths!
5^2 (or 5*5) = 25!
Now for the triangles, we know that they are all equal to each other, since this is a prism. To find the area of a triangle, use this formula:
1/2h*b
So let's insert these values into our equation!
1/2(5.6)(5)
2.8(5)
14
This means that the are for the triangles are all equal to 14!
SInce there are 4 triangles, we can multiply 14 by 4 to get 56!
Now we add the area of the square and the area of the triangles to that of the square!
We get 81!
Thank me later :)
