Answer:
Step-by-step explanation:
Sum of interior angles of a polygon formula:

n represents the n-sided polygon

Answer:
15
Step-by-step explanation: i'm not explaining why
Answer: Wai's hole is 6 inches deeper. (-6)
Step-by-step explanation:
15 minus 9 is equal to 6 so the difference is negative 6 inches
Answer:
72 pi + 48 pi= 120pi (not sure if I am right tho)
Step-by-step explanation: