Answer:
x = 98
Step-by-step explanation:
The chord- chord angle of 88° is half the sum of the measures of the arcs intercepted by the angle and its vertical angle , then
88 = [tex]\frac{1}{2}[/tex] (x + 78) ← multiply both sides by 2 to clear the fraction
176 = x + 78 ( subtract 78 from both sides )
98 = x
