In the RE model the length of the Equator is about 40,000Km and both Tropics are about 36,700Km long.
In an FE model (any model will do), what are the lengths of the Equator and the two Tropics?
If there is any doubt, by "Equator" I mean all the points on Earth where the Sun is overhead at an equinox, and by "Tropic" I mean all the points on Earth where the Sun is overhead at the respective solstice.
I did look on the WiKi before posting, but could not find anything about this (for obvious reasons).