Question

7. What is the m&CAB?
8. What is the m4YZW ?
880
2009
600

Answer 1

CAB = 70°

YZW = 120°

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)