The *Equi-Angular Skewness (Fidelity)* examine metric is available when at least one block is selected for *Examine*.
This metric is compatible with the Fidelity *Equiangular Skewness* metric.

For a given cell, the *Equi-Angular Skewness* at edge *i* is computed using the dihedral angle of the cell at that edge (γ_{i})
and the corresponding dihedral angle of the equivalent ideal cell at that edge (β_{i}).

`ES`

_{i} = max [(γ_{i}-β_{i})/(180-β_{i}), 1-γ_{i}/β_{i}]

where:

`ES`_{i}

= Equi-Angular skewness considering dihedral angle at cell edge `γ`_{i}

= Dihedral angle between the faces of the cell sharing edge `β`_{i}

= Dihedral angle between the faces of the equivalent ideal cell sharing edge The final equi-angular skewness of the cell is computed by taking the maximum of all the dihedral angles:

`ES = max [ES`

_{i}]

This function is calculated across entity boundaries when adjacent entities are also selected for *Examine*.