Answer:
last one in list
Step-by-step explanation:
The sum of the 3 angles in a triangle = 180°
Subtract the sum of the 2 angles in the left triangle from 180, that is
x = 180° - (23 + 75)° = 180° = 98° = 82°
Angles x and y form a straight angle, thus they sum to 180
y = 180° - x = 180° - 82° = 98°
Using the sum of angles on the triangle in the right
z = 180° - (54 + 98)° = 180° - 152° = 28°
Hence
x = 82°, y = 98°, z = 28°
