What is the distance from the North Pole to the Equator?
~ 6214.93 miles.
What is the circumference around the Equator?
For Flat Earth assume we mean the ground track path of the Sun at the Equinox.
~ 24,901 miles.
Whoops, Flat Earth just failed the most basic of geometric tests.
On a North Pole centered Flat Earth the distance of 6214.93 miles would be a radius and would give a circle of circumference of ~ 39050 miles for the Equator (or path of the sun at the Equinox). This is BASIC geometry - 2π × 6214.93
That is NO WHERE NEAR the actual value. You can compare hundreds of sources of information about both distances - thousands of flights, shipping routes, people driving. We know for a FACT it's nowhere even close to 39050 miles.
Flat Earth DOES NOT COMPUTE.