I have no idea
You add together the lengths of the nine sides of the nonagon.
The area is 1583 square units, approx.
Approx 566.9 square inches.
A regular nonagon with a side length of 9 has an apothem of 12.4 not 16. So the question is inconsistent.
nonagon
It is a plane area in the shape of a nonagon!
A nonagon is a plane area enclosed by nine straight lines.
Area of a nonagon with a circumradius of 2 units is 11.57 square units.
The area is indeterminate, since the shape can be a long thin nonagon with minimum area or a regular one with maximum area.
You add together the lengths of the nine sides of the nonagon.
Some pools are made in the shape of a nonagon. The Baha'i House of Worship in Wilmette, Illinois is also a nonagon.
First you must determin what the "apothem" is, and by that i mean what the hell that word means.
The area of a rectangle does provide enough information about its dimensions. It is possible fo the rectangle to be long and narrow or squat and short (almost square).
The area is 1583 square units, approx.
It is 72.3 square units, approx.
396 ft
Approx 566.9 square inches.