Answer:
h = 18.
z = 54.
Explanation:
Form 2 equations:-
z = 3h ( because opposite angles in a parallelogram are equal)
z + 7h = 180 ( because inside angles add up to 189 degrees).
Substitute z = 3h in the second equation:
3h + 7h = 180
10h = 180, so h = 18.
Therefore z = 3h = 54.