9514 1404 393
Answer:
x = 11
Step-by-step explanation:
The external angle is half the difference of the subtended arcs. The smaller arc is shown as 86°. The larger arc will be the difference between 360° and the two arcs shown.
larger arc = 360° -74° -86° = 200°
So, the external angle is ...
4x +13 = (200 -86)/2 = 57
4x = 44 . . . . . . . . . . . . subtract 13 from both sides
x = 11 . . . . . . . divide by 4
