Answer:
CAB = 70°
YZW = 120°
Step-by-step explanation:
CBA = 90° (right angle in a semicircle)
CAB = 180° - CBA - ACB ( angle in a triangle is 180°)
CAB = 180° - 90° - 20°
= 70°
YZW + YXW = 180° (opposite angle are supplementary in a cyclic quadrilateral)
YZW = 180° - YXW
= 180° - 60°
= 120°
(Correct me if i am wrong)
