The answer is the first choice.
Answer:
n = 39
Step-by-step explanation:
The base angles are congruent, that is
3n = 117 ( divide both sides by 3 )
n = 39
I think you multiply 12 and 16, then divide it by 2
which is 192 divided by 2
=96
the correct question in attached figure
Let
A1 -------------------------> area rectangular plot=4*9=36 m²
A2 ------------------------- > area square plot=x²
we have that
A1=A2
A2=x²=36---------------> x=√36=6 m
the answer is 6 m