I'm pretty sure the area of this triangle is 30 m squared. can someone tell me if i am right?

Find the area of the unshaded square

What is the solution to the equation below? 3/x-2+6=square root x-2 +8

The perimeter of an equilateral triangle is 4 cm more than the perimeter of a square and the length of a side of the triangle is 8 cm more than the length of a side of the aware. find the length of a side of the equilateral triangle