Step-by-step explanation:
The ratio of the two shorter legs of the top triangle is

The bottom triangle has the following ratio:

Since their ratios are the same, this means that the two triangles are similar.
Surface area is the total area of the surface. A cube has 6 surface, and each surface is the same. Each surface is a 11 by 11 square. Therefore there will be 6 11in. x 11in. surfaces. The math would be 11x11x6 =726.
Answer:
C
Step-by-step explanation:
Root 26
30.2 is correct according to PEMDAS