If A²+B²=C² what is the length of C for the skateboard ramp

An airplane flies from Naples, Italy, in a straight line to Rome, Italy, which is 120 kilometers north and 150 kilometers west of Naples. How far does the plane fly?

Mary Frances has a rectangular garden plot that encloses an area of 48 yd2. If 28 yd of fencing are purchased to enclose the garden, what are the dimensions of the rectangular plot?

The numerical difference between the area of a square and the perimeter of that square is 32. Find the length of a side of the square.