***Example file for this tutorial is attached below**

Here is an example of a **3D Tri-Axial Ellipsoid**.

Notice the above is an ellipsoid shape, with three distinct axises of symmetry, **a, b, and c.**

If you revolve a simple sketch created using the "ellipse" sketch tool with height & width **a** and **b****,** and revolve about axis **a, **you run into a problem: You only end up with a **3D Bi-Axial ellipsoid**, such as the one shown below with axises **a** and **b**.

To make an ellipsoid tri-axial we can't rely on only sketch revolve.

Let's assume we have the above bi-axial ellipsoid with width **b **which corresponds to the desired tri-axial ellipsoid dimension of** b**. But, we also need an axis of length **c **to be present in our ellipsoid.

Since **b **is of known length, as is **c**, it's possible to assume there exists some **S** value you can solve for, such that:

**S*c = b**

After solving for **S**, here we use Alibre Design's **non-uniform ****scale command **on the bi-axial ellipsoid to modify the **c**** **direction with scalar value = **S.**

The result after the scaling is a tri-axial ellipsoid: