Textbook Problem

In Exercises 17 to 30, use the formula $A=\frac{1}{2}aP$ to find the area of the regular polygon described.

In a regular polygon of 12 sides, the measure of each side is 2 in., and the measure of an apothem is exactly $\left(2+\sqrt{3}\right)\text{in}\text{.}$ Find the exact area of this regular polygon.