Question

How to find the area of a regular polygon

Answer 1

Area=1/2(ap)

Explanation:

The area of a regular polygon is one-half the product of its apothem and its perimeter. Where a denotes the length of an apothem, and p denotes the perimeter.

Answer 2

You can always find the area from breaking it up into smaller shapes. For example, a hexagon is basically 2 trapezoids.
Some formulas for different shapes.
Trapezoid: height × (base1 + base2) / 2
Rectangle: length x width
Parallelogram: height x base
Triangle height x base / 2