triangles

            Short leg  |  Long leg  |  Hypotenuse

1)               √3                    3                  2√ 3

2)                3                    3√3                  6

3)              3√3                    9                  6√3  

4)                9                    9√3                  18

All sides of triangle #3 are 3X the sides of triangle #1. The same is for triangles #4 and #2.

We have that the long leg of a 30-60-90 trianlge is sqrt3*[short leg] so it is sqrt3*sqrt3*sqrt3*sqrt3 since the *2 and the /2 cancel out so we have (sqrt3)^4/sqrt3 so we have sqrt3^3=3sqrt3 and our final answer is \(\boxed{3\sqrt3}\)