[foliveira]

Including Azores definitely affected the final result. It's weird that other countries didn't have their islands include though

[flurdy]

Others are also affected by islands and territories, see France with French Guyana etc, Norway with Svalbard etc. France is quite a square country if you only consider its mainland so it is an odd choice to include non mainland areas but I guess it is a difficult greyzone on what to include and not.

[Laforet]

The French themselves refer to metropolitan France as l'Hexagone so it probably still would not be a square.

[foliveira]

Somehow I was thinking about France with French Guyana but must have passed it.

As some have said, I'd like to check the impact of only using mainland in the calculations.

[lagadu]

I'd say France is far more a pentagon than a rectangle.