In Circle YmAD = 68° and mBC = 156. Find mZ1

Answer:
m<1 = 112°
Step-by-step explanation:
Given:
Arc BC = 156°
Arc AD = 68°
Required:
m<1
Solution:
m<1 = ½(arc BC + arc AD) => based on intersecting chords angle measure theorem
Substitute
m<1 = ½(156° + 68°)
m<1 = ½(224)
m<1 = 112°