GHE dimensions sometimes give errors on shape when they shouldn't

[vtnate]

Expected Behavior

This calculation should return a value above zero for any rectangle.

discriminant = perimeter**2 - 16 * area

Actual Behavior

Creating something close to square in the internal UI gives values that trigger the ValueError in the code above.

If a geojson specifies a GHE with area=10277 and perimeter=404, the result is below zero:
404 ^2 = 163,216
16 * 10277 = 164,432

Steps to Reproduce

Version Information

Modelica Buildings Library: X.Y.Z
Modelica Standard Library: X.Y.Z
TEASER: X.Y.Z
Python: X.Y.Z

[vtnate]

A GHE in the geojson withfeature["properties"]["footprint_area"] = 10227 and feature["properties"]["footprint_perimeter"] = 404 is an example of what causes this error.