Answer:
a=9 , d=6 n=8
a+(n-1)d = an
9+(8-1)6 = an
9+7×6 = an
9+42 = an
51 = an
Step-by-step explanation:
Let the measure of required angle be x degree
Thus, first option is the correct answer.
Both 38 and 58 are even so they both can be divided by 2,
38/58
19/29
that is in the simplest form