I'm overwhelmed plan Module 8 part 3 Maximizing a Polygon's Area

Question 3

Quantity AThe area of a hexagon with perimeter 36 and one interior angle measuring 70∘

Quantity B 54√3​.
The question didn’t specify whether the polygon is regular or not. The answer assumes the polygon is not regular but it doesn’t tell us that anywhere in the question. If it were regular then the answer would be C, since it wasn’t specified I chose D.

There is a specific constraint in quantity A that prevents the hexagon from being regular.