Step-by-step explanation:
Each interior angle=140°
(n-2)180°/n=140°
180°n-360°/n=140°
180°n-360°=140°n
180°-140°=360°
40°n=360°
n=360°/40°
n=9
Hence, the number of sides of the polygon is 9.
It is nonagon .
Answer: 2.5, 5.4
Step-by-step explanation:

About 7.5 miles if you divide 45/3 is 15 so divide 15/2 which is 7.5
7 and a half cups.
Step-by-step explanation:
Dvide 60 by 8