What is the surface area of the cube? a. 729 mm2 b. 486 mm2 c. 324 mm2 d. 81 mm2

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