Answer:
meh
14fri
Step-by-step explanation:
Assuming that the figure is implying that angles 1 and 2 are the same, we have

So, the measure of angles 1 is

A(4) = 1/2 a(n - 1) + 12 = 36
1/2 * 3a + 12 = 36
3/2 a = 24
a = 16
so first term = 1/2 * 16 (1 - 1) + 12 = 12
which is different from any of the choices.
you sure you have the question right? Or maybe i misread it.