Of all geometrical figures, the circle has always been the main figure. A circle is such a spherical form with no corners or edges. It can be defined as a closed two-dimensional curved object in geometry. Also, circle is associated with a number of formulas and concepts. Probably the most useful is the circumference and sector of a circle.

In this article, we’ll share some useful information regarding the circumference formula calculator and the area of sector calculator.

**What is a Sector**

When we begin with a circle and draw a radius line around it, the area marked off resembles a wedge of pie or a slice of pizza; this is referred to as a “sector” of the circle. In other words, a sector is defined as a portion of a circle made up of the circle’s arc and two radii.

Thus a sector is a section of the circle made up of a part of the circumference (arc) and the circle’s radii at both ends. As before, the slice of pizza or a pie can be likened to the form of a circle’s sector.

Thus the sector is essentially a segment of a circle that can be described using the three points mentioned below:

**The portion of a disc surrounded by two radii and an arc is known as a circular sector**.- A sector splits the circle into two parts: Major and Minor Sector.
- The Minor Sector refers to the smaller area, while the Major Sector refers to the larger area.

**Area of a Sector**

**The region contained by the two radii of a circle and the arc is known as the area of a sector. In simple terms, a sector**‘s area is a portion of the circle’s size. If you know the radius and the central angle or arc length, you can calculate the area of a sector.

As we already knew, a circle’s entire area is equal to *πr*2. **Since the area of the sector is directly proportional to its angle, and 2***π*** is the angle for the whole circle, in radians, the **area of the sector is calculated by multiplying the circle’s area by the ratio of the angle provided in radians and 2*π*.

Therefore, the following two parameters must be known in order to compute the area of a sector:

**Circumference**

**The perimeter of a rectangle or square, as you may recall, is the distance around it. The circumference, on the other hand, is the distance around** a circle (c). Thus the circumference of a circle is its perimeter or the length of its full arc. It is the whole length of the circle’s border.

The circumference of a circle is the product of the constant “π” and the circle’s diameter. For instance, this measure of the diameter of a circle is required by a person strolling through a circular path or for a circular body that requires fencing. The circumference is a linear value with the same units as the length units.

**Finding the Circumference of a Circle**

Depending on the parameters provided, two formulae are employed to calculate the circumference C of a circle. The irrational number Pi, which is represented by the Greek letter, is used in both circumference formulas.

Pi is a mathematical constant as well as the ratio of a circle’s circumference to its diameter. If you know the diameter or radius of a circle, you can always find its circumference. Below are given both the formulae for finding the circumference of a circle:

- If you know the diameter of the circle, d, utilize this formula to find the circumference of a circle:

** C = πd**

- The circumference C the length around the outside of the same circle when the radius is provided is calculated as follows:

** C=2πr**

Also, besides of using these formulas we may try circumference calculator with steps to find the circumference of circle, either diameter of a circle is known or not.

**I hope you get to know about the useful information regarding circumference and area of a sector. Do send us your feedback whether it helps you or not or you want to highlight some other information that may be useful in this regard. Cheers!**