Answer:
m<S = 80°
Step-by-step explanation:
The figure given shows a cyclic quadrilateral.
Angle S and Angle Q are opposite angles of the cyclic quadrilateral. Thus, it is known that opposite angles of a cyclic quadrilateral are supplementary. Since m<Q = 100°
Therefore:
m<S = 180° - 100°
m<S = 80°
