Adam is building a deck in his backyard around a tree. The deck is in the shape of a regular octagon. In the center of the deck, there is a hole for the tree. If a = 9.7 ft, s = 8 ft, and the diameter of the hole is equal to 7 ft, find the area of the deck to the nearest tenth of a square foot. (Use 3.14 as an approximation of pi.)

answear:

a

step-by-step explanation: a

so a parallelogram is just like a square base times height. multiply 40 and 39 to get 1560 inches.

a triangle is base times height divided by two. so multiply 7.9 and 5 and then divide it by 2 to get 19.75inches.

the kite can be split into two separate triangles and added together to get the total area. 30 x 4 /2 which equals 60. make sure to double it for the two triangles making 120.

it would be 0.18 because when the other choices are converted they equal those two numbers.   hope this !