A NONA=9, nonagon has 9 sides, so it's perimeter is 7+7+7+7+7+7+7+7+7, or 63, and we know the apothem.
bearing in mind that the area of a regular polygon is
(1/2)ap a = apothem, p = perimeter
so in this case that'd be (1/2)(5)(63).
Answer: the first answer is correct i think :]
Answer:
the answer to - 2/5 -4/5 + - 9/10 is -2.1
20b + 18s < = 150 (thats less then or equal)
