Are lines of latitude equal distances apart ?

Yes lines of latitude are always equal distances apart. The fact that they are equal distances apart can be proved from the fact that they never converge with one another. The lines are also called parallels and run from east to west. As it has been proved mathematically that parallel lines will always be equal distance away from each other, so lines of latitude are always equal distance from one another. Lines of latitude are actually used for the measurement of distance north and south of the equator.

Humid continental climate is found in the interior of continents between the 30 and 60 degrees latitude, but usually above the 40 degree line.   40 degrees north of the equator means less direct sunlight and therefore less warmth.   this climate is mainly found in the northern hemisphere since there are no major landmasses in the southern hemisphere.  if you live in northern indiana, you know all about humid continental because that is the climate type you have!