Instructions: Find the measure of the missing angle using the Exterior Angle Sum
Theorem.

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 600 because 15*10*2=300

300+300=600

step-by-step explanation: