we know that
the area of a triangle is equal to
\(A=\frac{1}{2}*base*heigth\)
in this problem we have
\(heigth=n\ yd\\base=6\ yd\)
to find the area of the floor , calculate the area of the triangle
substitute the values in the formula
\(A=\frac{1}{2}*6*n\)
\(A=3n\ yd^{2}\)
therefore
the answer is the option
2. 3n
