When I use a coordinate plane and i'm on the bottom left ...which number would i put first the one on the x axis or the one on the y axis like (-A,-B) ?

(-x, -y)

Step-by-step explanation:

The bottom left of the coordinate plane, or quartile 3, is to the left of the x axis origin and below the y axis origin. The x axis and the y axis are merely number lines. To the left of zero are the negatives, and to the right are positives. X is always first, so it would be (-x, -y).

the one on X axis, kinda like the alphabet, x comes before y so you put the number resembling X first, then put the number resembling Y

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.

55? i think maybe

step-by-step explanation: