# Area of polygon using radius calculator

To calculate the area of a polygon using radius, you need to know the number of sides, the length of the radius, and the length of the side. The formula for calculating the area of a regular polygon using the radius is:

Area = (n × r^2 × sin(360/n))/2

Where:

• n is the number of sides of the polygon
• r is the radius of the polygon
• sin is the trigonometric function sine

Here are the steps to calculate the area of a polygon using the radius:

1. Determine the number of sides of the polygon.
2. Measure the length of the radius of the polygon.
3. Measure the length of one of the sides of the polygon.
4. Substitute the values of n, r, and s in the formula mentioned above.
5. Solve the equation to get the area of the polygon.

Note: If the polygon is not regular, you cannot use this formula to find its area.

### Area of polygon using radius

To find the area of a regular polygon using the radius, you can use the following formula:

Area = (n * r^2 * sin(360/n))/2

where:

• n is the number of sides of the polygon
• r is the radius of the polygon
• sin is the sine function
• 360/n is the central angle of the polygon

To use this formula, you need to know the value of n and the radius of the polygon. Then, you can substitute these values into the formula and calculate the area.