If you are not knowing the difference between radius and diameter and get confused while solving the circle problems then this topic is for you. I will tell you the main and important differences that will help you to easily understand the radius and diameter of the circle. You will come to know how to calculate the radius, what is diameter formula, etc on this topic. So without skipping please read everything about the difference between radius and diameter carefully.

## What Is The Difference Between Radius And Diameter?

The difference between radius and diameter is the start point and length in the circle. You will be able to notice the length of diameter and radius change from each other even if they are connected with the center of the circle. So let us see the actual meaning of radius as well as diameter in the following.

Radius is the line that starts from the center of the circle and touches the edge of the circle. If the line is drawn from the center point of the circle to any direction it is always the same.

### What Is Diameter?

Diameter is the straight line that starts from one end of the circle and touches another end of the circle, however, it also passes from the circle’s center. Diameter is also called the longest chord as it touches two edges of the circle’s circumference.

Let us begin with the

## Difference Between Radius And Diameter

Below I have described the difference between radius and diameter in detail. You will come to know the points like length, formula, symbol, etc of radius vs diameter.

1. ### Length

The first point is the length to study the difference between radius and diameter of circle geometry.

The length of the radius is shorter than the diameter of the circle.

Diameter

The diameter length is two times that of the radius of the specified circle. It begins from any point from the edge of the circle but the difference between chord and diameter is the ending point which is at another opposite edge of the same circle respectively.

1. ### Symbol

For recognizing the difference between radius and diameter protocol symbols are used.

The symbol of the radius is denoted by ‘R’ or ‘r’. That is R for the radius in simple meaning.

Diameter

The letter ‘D’ or ‘d’ is used as a symbol for diameter.

1. ### Formula

There is a simple formula that is used to calculate the difference between radius and distance of the diameter or vice versa.

The formula for the radius of a circle is r = d/2. This means the diameter is divided in half to get the radius value.

Diameter

The formula of the diameter of the circle is d = 2r. The radius is multiplied by two to calculate the length of the diameter. The diameter to radius calculator is available on the internet where circle maths problems can be solved easily.

1. ### Intersection At Center

What is the difference between radius and diameter intersection at the center point of a circle is described in the following?

Radius starts from the center of the circle without intersecting it. You can draw as many radii in 360 directions of the circle.

Diameter

In diameter, you will see that it start from one edge of the circle and intersect at the center point of the circle, and then ends at another edge. A line of the diameter divides a circle into two equal half parts.

1. ### Points And Edge

In what is the difference between radius diameter and circumference you will notice edge and points relationship.

The radius is originating from the center point and touches only at one point at the edge of the circle

Diameter

Whereas the difference between diameter and radius in points and edges connection the diameter touches at two different points on the circumference.

1. ### Example

Here are a few maths examples of the difference between radius and circumference diameter.

If the circle is having a diameter of 7 centimeters then its radius is calculated using r = d/2.

You will get r = 3.5 cm i.e., 7/2 = 3.5 centimetre.

Diameter

To calculate the diameter of a given circle with r = 4 inches then you can use d = 2r. Hence the circle with a radius of 4 will have a diameter of 8 inches.

On Whatisss you can get to know more facts like these.

## FAQ

The radius is one half of the diameter in measurement. The radius measures the distance from the very center of the circle to any point on the circle.

In this article, you learned the difference between radius and diameter through important points. I told you new things that you might not be knowing before of radius and diameter. You came to know the radius as well as diameter intersection, length, start, and so on. I explained to you the formula that you can use to calculate the radius and diameter easily. Now you are not having any doubts about the difference between radius and diameter and can solve its maths problem.

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