Answer:
x = 252°, y = 126° , z = 54°
Step-by-step explanation:
( Hopefully I've read the size of the angle 126° correctly )
The central angle x is twice the inscribed angle, that is
x = 2 × 126° = 252°
∠ y = 126° ( angles on the circumference subtended by the same arc )
y and z are adjacent angles and are supplementary , that is
y + z = 180°
126° + z = 180° ( subtract 126° from both sides )
z = 54°
