(a)
The angle R of triangle PQR is congruent to the angle U of triangle STU. So
(b)
The angle H of triangle GHJ is congruent to angle Q of triangle PQR and angle Q of triangle PQR is congruent to angle T of triangle STU, which means
So,
(c)
The side QR of triangle PQR is congruent to the side TU of triangle STU. So
(d)
The side JG of triangle GHj is congruent to side RP of triangle PQR and side RP of triangle PQR is congruent to side US of triangle STU. So