Answer: <F = 68˚, <G = 112˚, <H = 112˚
Since the trapezoid is isosceles, <F = <J = 68˚, and <G = <H. To solve for the remaining angles, we note that the sum of all angles in a quadrilateral is 360˚, so <F + <J + <G + <H = 360˚. Plugging in <F = <J = 68˚, we have <G + <H = 360˚ - 2 × 68˚ = 224˚. Since <G = <H, they are both equal to 224/2 = 112˚.
i hope this helps! :D