## < ⎙ 11 Other formulas that you can solve using the same Inputs

Circumference of an ellipse
Circumference of an ellipse=((pi*Major axis*Minor axis+(Major axis-Minor axis)^2))/(Major axis/2+Minor axis/2) GO
Focal parameter of an ellipse
Focal parameter of an ellipse=Minor axis^2/Major axis GO
Eccentricity of an ellipse (a>b)
Eccentricity=sqrt(1-((Minor axis)^2/(Major axis)^2)) GO
Eccentricity of an ellipse (b>a)
Eccentricity=sqrt(1-((Minor axis)^2/(Major axis)^2)) GO
Radius of the Circumscribed circle=Major axis/2 GO
Flattening of an ellipse
Flattening=(Major axis-Minor axis)/Minor axis GO
Latus Rectum of an ellipse (a>b)
Latus Rectum=2*(Minor axis)^2/(Major axis) GO
Latus Rectum of an ellipse (b>a)
Latus Rectum=2*(Minor axis)^2/Major axis GO
Directrix of an ellipse(a>b)
Directrix=Major axis/Eccentricity GO
Area of an ellipse
Area=(pi*Major axis*Minor axis)/4 GO
Length of major axis of an ellipse (a>b)
Length=2*Major axis GO

## < ⎙ 1 Other formulas that calculate the same Output

Directrix of an ellipse(a>b)
Directrix=Major axis/Eccentricity GO

### Directrix of an ellipse(b>a) Formula

Directrix=Major axis/Eccentricity
More formulas
Eccentricity of an ellipse (a>b) GO
Eccentricity of an ellipse (b>a) GO
Directrix of an ellipse(a>b) GO
Latus Rectum of an ellipse (a>b) GO
Latus Rectum of an ellipse (b>a) GO
Length of major axis of an ellipse (a>b) GO
Length of the major axis of an ellipse (b>a) GO
Length of minor axis of an ellipse (a>b) GO
Length of minor axis of an ellipse (b>a) GO
Linear eccentricity of an ellipse GO
Semi-latus rectum of an ellipse GO
Eccentricity of an ellipse when linear eccentricity is given GO
Semi-major axis of an ellipse GO
Semi-minor axis of an ellipse GO
Latus rectum of an ellipse when focal parameter is given GO
Linear eccentricity of ellipse when eccentricity and major axis are given GO
Linear eccentricity of an ellipse when eccentricity and semimajor axis are given GO
Semi-latus rectum of an ellipse when eccentricity is given GO

## What is a directrix and how it is calculated for an ellipse ?

Directrix of an ellipse(b>a) is the length in the same plane to its distance from a fixed straight line. For an ellipse, it is calculated by the formula x=±b/e where x is the directrix of an ellipse when a is the major axis, b is the major axis, and e is the eccentricity of the ellipse.

## How to Calculate Directrix of an ellipse(b>a)?

Directrix of an ellipse(b>a) calculator uses Directrix=Major axis/Eccentricity to calculate the Directrix, Directrix of an ellipse(b>a) is the length in the same plane to its distance from a fixed straight line. Directrix and is denoted by x symbol.

How to calculate Directrix of an ellipse(b>a) using this online calculator? To use this online calculator for Directrix of an ellipse(b>a), enter Major axis (a) and Eccentricity (e) and hit the calculate button. Here is how the Directrix of an ellipse(b>a) calculation can be explained with given input values -> 10000 = 10/0.1.

### FAQ

What is Directrix of an ellipse(b>a)?
Directrix of an ellipse(b>a) is the length in the same plane to its distance from a fixed straight line and is represented as x=a/e or Directrix=Major axis/Eccentricity. Major axis is the line segment that crosses both the focal points of the ellipse and Eccentricity of an ellipse is a non-negative real number that uniquely characterizes its shape.
How to calculate Directrix of an ellipse(b>a)?
Directrix of an ellipse(b>a) is the length in the same plane to its distance from a fixed straight line is calculated using Directrix=Major axis/Eccentricity. To calculate Directrix of an ellipse(b>a), you need Major axis (a) and Eccentricity (e). With our tool, you need to enter the respective value for Major axis and Eccentricity and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.
How many ways are there to calculate Directrix?
In this formula, Directrix uses Major axis and Eccentricity. We can use 1 other way(s) to calculate the same, which is/are as follows -
• Directrix=Major axis/Eccentricity
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