Respuesta :

The area of a regular octagon is given by:
 A = (4) * (L) * (ap)
 Where,
 L: side
 ap: apotema
 Substituting values we have:
 A = (4) * (19) * (16)
 A = 1216 square inches
 Answer:
 
The area of a regular octagon with an apothem 16 inches long and a side 19 inches long is:
 
A = 1216 square inches