Surface area is just the area of all these 4 triangles plus the rectangle.
First we can find the area of the rectangle.

Half of the length is 28 cm, so the full length must be 28 * 2 = 56 cm.


The base for the left and right triangles are 27. The heights would be the net length minus half the length of the rectangle:

Calculate the area:



We have two of these triangles.

Now do the other two pair of triangles. The bases for them are 28 + 28 = 56 cm. The heights would be the net width minus the width of the rectangle:

Now find the area:



We have two of these triangles.

Add all the areas together:
Answer:
=-4
Step-by-step explanation:
The answers should be 1D, 2C, 3B, 4A, and 5A.
Answer:
Step-by-step explanation:
If you simplify you get 0 = 19/3, which is false. So there is no solution.