What is the total of the interior angles of a nonagon?

1260 degrees

So, the sum of the interior angles of a nonagon is 1260 degrees. All sides are the same length (congruent) and all interior angles are the same size (congruent).

for this case we have by definition, if two lines are perpendicular, then the product of their slopes is -1.

then, given the following line:

so,

we are looking for m_ {2}:

then, the line is given by:

we find "b" replacing the given point:

finally, the equation is:

option c

i think the answer is d im not sure