Solve the inequality -2n > -6

A. n>3
B. n>-3
C. n<3
D. n=3

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.

incomplete question. how do you expect anyone to you when you do not post the question in its entirety?