# How to find the diameter of a circle?

The diameter of a circle is a value that can be known using other dimensions or measurements like radius, area, and circumference, so if you don’t know how to get the diameter of a circle, we’ll show you how to do it, applying math formulas.

## How to calculate the diameter of a circle?

calculate the diameter of a circle is a simple procedure, you need to solve a linear math formula using the math dimension provided by the problem. We will see how to solve it step by step.

### Step #1.- Calculate the diameter of the circle using the area✔

In case of you want to calculate the diameter of a circle with the area you must perform the following steps:

#### #1.1: Formula Approach:

The first step is to configure the formula and replace the values . In this case, the formula is: 2 x square root of area divided by π (3.1416). So, in the area we will put the value that the problem gives us.

#### #1.2: Operationalization:

To perform the correct calculation, first you must divide the area by pi, then calculate the square root of the result obtained.

#### #1.3: Go from radius to diameter:

O result of this operation will be the radius of the circle, so what we do is multiply by two to get the diameter.

### Step #2.- Calculate the diameter of a circle with the circumference✔

If the problem to show the value of the circumference, the procedure is simple, what you should do is the following:

#### #2.1: Formula Approach:

##### The formula in this case is as follows:

Radius diameter = Circumference / π (3.1416).

See also  How to tie a tie?

#### #2.2: Value Substitution:

So what you do is put the value of the circumference within the division.

#### #2.3: Operationalization:

Solve simple linear division. For example, if the circumference is equal to 100, dividing it by 3.1416, the result is 31.83

### Step #3.- Calculate the diameter of a circle from the radius✔

In the case of giving you the radius, the procedure is simpler, just multiply the radius value by 2 and it will give you the diameter value.

### Step #4.- Calculate the diameter of a circle in your drawing✔

He can problem arise you have to know the diameter of the drawing of a circle, in this case, they don’t offer you values ​​or anything. To perform the calculation, you will need a compass, a ruler and a pencil. The procedures to follow are as follows:

#### #4.1: Draw a straight line:

The first thing is to draw a straight line that touches two points on the circle , that is, it must cross the circle. Points on this line will be named A and B.

#### #4.2: Divide the circle into two parts:

Proceed to locate yourself at the first point or point A using the metal tip of the compass then open the compass to the middle of the circle (that is, the midpoint that divides the circle into two equal halves).

#### #4.3: Draw two circles:

Using this compass measurement, you will position the metal tip at point A and draw a circle on the left side (outside the circle) and then draw another one from point B to the right.

#### #4.4: Draw the diameter:

Making the two new circles you can see that both converge at two points inside and outside the circle. So, you should take your ruler and draw a line that connects these two new points on the circles and you will see that it cuts the initial circle in two points again.