HELP Complete the statements. First, both sides of the equation. Next, simplify the equation to get the solution. . Check the solution by substituting for f and simplifying.

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.

it's both, now can you answer my most recent question?

idk

step-by-step explanation: