To calculate the area of a polygon using apothem, you need to know the length of the apothem and the number of sides of the polygon. Here’s the formula:

Area = (1/2) x apothem x perimeter

Where:

• apothem is the distance from the center of the polygon to the midpoint of a side
• perimeter is the total length of all sides of the polygon

To use the calculator, follow these steps:

1. Input the length of the apothem in the designated field
2. Input the number of sides of the polygon in the designated field
3. Input the length of each side of the polygon in the designated field (if known), or leave it blank
4. Click on the “Calculate” button
5. The area of the polygon will be displayed

Note: If you don’t know the length of each side, you can still calculate the perimeter by multiplying the number of sides by the length of one side.