Horace is running a race. he begins to wonder how fast he is running. which unit rates would be reasonable for horace to use to describe how fast he is running? select each correct answer. mm/min mi/h in./h km/h

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.

idk i would have to be there to under stand it

step-by-step explanation:

idk i would have to be there to under stand it