Please solve this following problems.^^*

Find the sides of the [30-60-90] right triangle.

1.hypotenuse=?

shorter leg= ?

longer leg= 12

2. hypotenuse=7√3

shorter leg=?

longer leg=?

3. hypotenuse=?

shorter leg=?

longer leg=15

4. hypotenuse=2√2

shorter leg=?

longer leg=?

5. Find the perimeter of a square if a diagonal is 12.

6. Find the perimeter of an equilateral trianle if an altitude has length 7√3.

Please explain me about how to solve the square root number like 8√3 x 2√2. and 6 x √3.

Thank you...^^

Hope you a lucky day~!!!!!!!!!!