A certain car's windshield wiper clears a portion of the windshield in the shape of a sector as shaded in the diagram below. If the wiper pivots 120 each swing, what is the area of the windshield that is wiped in each swing?

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

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