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:
| Aspect Ratio | (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:
| Aspect Ratio | longest side squared / (2 * triangle area) |
| Range | From 1.16 (equilateral triangle) to infinity (straight line). |
For 3-dimensional mesh:
| Aspect Ratio | longest edge length / (shortest perpendicular height) * sqrt(1.5) |
| Range | From 1.16 (equilateral tetra) to infinity (flat tetra). |