Answer:
Step-by-step explanation:
Apply : Angles of Intersecting Chords Theorem
m∠x is half the sum of the measure of the arcs intercepted by the angle and its vertical angle.
m∠x = 1/2(54+204)
Add numbers in brackets.
m∠x = 1/2(258)
Expand brackets.
m∠x = 129
8
b.
The quantity x minus 2y is (x - 2y), then we add 3.
