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Area of a polygon calculator finds the primerer and area of a regular polygon. A Polygon is a closed plane figure having three or more sides. A Polygon is a closed plane figure bounded by three or more straight sides which are equal and also all interior angles are equal.

Calculate the area, perimeter of Polygon (Polygon Calculator)

Table of Contents:

**Formula**

__Using length of a side :__

Area of Polygon = ((side)² * N) / (4Tan(π / N))

Perimeter of Polygon = N * (side)

__Using radius (circumradius) :__

Area of Polygon = ½ * R² * Sin(2π / N)

__Using apothem (inradius) :__

Area of Polygon = A² * N * Tan(π / N)

where A = R * Cos(π / N)

__Using apothem and length of a side :__

Area of Polygon = (A * P) / 2

where A = side / (2 * Tan (π / N))

**where,**

N = Number of sides, A = Apothem, R = Radius, P = Perimeter

A number of coplanar line segments, each connected end to end to form a closed shape are known as a **Polygon**. Triangles, rectangles and pentagons are examples of polygon.

Regular polygon area calculator also includes perimeter of a polygon calculator.

__Examples__:

Case 1: Find the area and perimeter of a polygon with the length 3 and the number of sides is 4.

** Step 1:** Find the area.

Area = ((side)² * N) / (4Tan(π / N))

= ((3)² * 4) / (4 * Tan(3.14 / 4))

= (9 * 4) / 4 * Tan(0.785)

= 36/ 4 * 0.999

= 36/ 3.996

Case 2: Find the area of a polygon with the given radius 3 and the number of sides is 5.

Area = ½ * R² * Sin(2π / N)

= (0.5) * 3² * Sin(2 * 3.14 / 5)

= 0.5 * 9 * Sin(6.28 / 5)

= 2 * Sin(1.26)

= 4.5 * 0.95

Case 3: Find the area of a polygon with the given radius 3 and the number of sides is 5 using Apothem.

Apothem = R * Cos (π / N)

= 3 * Cos (3.14 / 5)

= 3* Cos (0.63)

= 3 * 0.808

Area = A² * N * Tan(π / N)

= 2.43² * 5 * Tan(3.14 / 5)

= 5.90 * 5 * Tan(0.63)

= 29.52* 0.73

Case 4: Find the area of a polygon with the length 3 and the number of sides is 4 using Apothem.

Apothem = side / (2 * Tan(π / N))

= 3/ (2 * Tan(π / 4))

= 3 / (2 * Tan(0.785))

= 3/ (2 * 0.999)

= 3 / 1.998

Area = (A * P) / 2

= (1.501 * 12) / 2

= 18.012 / 2