The figure below is a parallelogram. Find the measures of m and n: need help

the two may have that, even a breakdown is probably offered

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

d. 145*2 is 290 than the total angle is 360 then minus 290 then divide by two