Bob is trying to determine how much fence he needs to surround his house. he determined the length has a distance of 56 ft and the width has a distance of 37 ft. how much fence is needed to surround the house? a. 186 ft. b. 2072 ft. c. 204 ft. d. 1874 ft.

check the picture below.

well, the angle at the vertex d is clearly not a right-angle, let's check for the one at the vertex f which does look like,   however if it's indeed, that means ef is perpendicular to df, in which case their slopes will be negative reciprocal of each other.

so the negative reciprocal of the slope of ef is 1, however the slope of df is not 1, is 1/2, so nope, they're not perpendicular lines.