## What is the formula for finding the area of a pentagon?

The basic formula for the area of a regular pentagon is, Area of pentagon = 1/2 × p × a; where ‘p’ is the perimeter of the pentagon and ‘a’ is the apothem of a pentagon.

**What is the formula for the area of a dodecagon?**

The formula for finding the area of a regular dodecagon is: A = 3 × ( 2 + √3 ) × s2 , where A = the area of the dodecagon, s = the length of its side. For example, if the side of a regular dodecagon measures 8 units, the area of this dodecagon will be: A = 3 × ( 2 + √3 ) × s2 .

**What is a 12 sided figure?**

dodecagon

A dodecagon is a 12-sided polygon. Several special types of dodecagons are illustrated above. In particular, a dodecagon with vertices equally spaced around a circle and with all sides the same length is a regular polygon known as a regular dodecagon.

### How do you find the area of a dodecagon with the radius?

For a regular dodecagon with sides s, the area formula is: A = 3 × (s)^2 × (2 + √3)

**How do you find the perimeter of a pentagon?**

To find the perimeter of any shape, you simply add all the sides together. If you’re finding the perimeter of a pentagon, there are five sides so you’ll add the lengths of those sides together. The sum will be your answer.

**What is a polygon perimeter?**

The total distance of the outer sides of a closed figure is known as the perimeter. It is the total length of all sides of a polygon. Perimeter = Sum of all sides.

## What is the formula for the circumference of a circle?

The ratio of the circumference to the diameter of any circle is a constant known as pi (π), which is equal to approximately 3.14159. From this relationship, we can derive the formula for the circumference of a circle: where C is the circumference and d is the diameter of the circle.

**How to calculate diameter in terms of circumference?**

How to Calculate Diameter from Circumference? The formula for circumference = diameter × π Or, diameter = circumference/π So, the diameter of the circle in terms of circumference will be equal to the ratio of the circumference of the circle and pi.

**What are the units of circumference?**

Since a circle’s circumference is the linear distance of the circle’s edge, it describes a length. Therefore, the most common units of a circle’s circumference are millimeter, centimeter, meter for the metric system, and inch, feet, and yard for the imperial system.

### How do you find the diameter of a circle in Pi?

The formula for circumference = diameter × π Or, diameter = circumference/π So, the diameter of the circle in terms of circumference will be equal to the ratio of the circumference of the circle and pi.