Ok, I got done with one page thanks to some of you guys, but it's due tommorow. I don't know what to do.

Find the area of an equilateral triangle with the sides 5 x sqrt(2) and another triangle with the sides (2x-1).

Also can someone if I did this right.

An area of a square with the sides 3 x sqrt(5) and I got 45 mm ^2.