Answer:
The area of the nonagon is 270cm²
Step-by-step explanation:
The area of a regular polygon is given by

where 'a' is the apothem and 'p' is the perimeter.
The apothem is a=6cm.
The perimeter is p=9×10=90cm.
We substitute the apothem and the perimeter to get:


Answer:
9
Step-by-step explanation:
Answer: 8.85km
Step-by-step explanation:
8,850m = 8,850 m⋅1 km / 1,000 m