You can work with mesh aspect ratios in either normalized or standard format.
Normalized is recommended, however, use standard when attempting to maintain compatibility with previous Autodesk products.
Find below the definitions of normalized aspect ratio and standard aspect ratio.
For 2-dimensional mesh:
| AR | (4 * SQRT (3) * Area of triangle) / sum of squares of edge lengths. |
| Range | From 0.0 (straight line) to 1.0 (equilateral triangle). |
For 2-dimensional mesh:
| AR | longest side squared / (2 * triangle area) |
| Range | From 1.16 (equilateral triangle) to infinity (straight line). |
For 3-dimensional mesh:
| AR | longest edge length / (shortest perpendicular height) * sqrt(1.5) |
| Range | From 1.16 (equilateral tetra) to infinity (flat tetra). |