The following octagon is formed by removing four congruent right triangles from a rectangle. What is the area of each triangle?

2 cm2
4 cm2
6 cm2
8 cm2

1/4 because there is 4 grades.

$4034.40

the perimeter of the field is the sum of the lengths of the four sides:

47 yd + 158 yd + 47 yd + 158 yd = 410 yd

the cost of 3 ft (1 yd) of fence is 3×$3.28 = $9.84.

so the cost of jake's wood perimeter fance is

(410 yd) × ($9.84 /yd) = $4034.40