Someone answer my last unanswered question

The interior angles formed by the side of a hexagon have measures of them up to 720° what is the measure of angle a

36x2 + 49y2 = 1,764 the foci are located at: (-√13, 0) and (√13,0) (0, -√13) and (0,√13) (-1, 0) and (1, 0)edit: the answer is (- the square root of 13, 0) and (the square root of 13, 0)

The legs of a right triangle measure 6 meters and 8 meters. what is the length of the hypotonuse.