Every 10 mile linear stretch of earth or ocean MUST HAVE 66.6 FEET of "curvature" for the earth to be a sphere approximately 25,000 miles in circumference!

This is a mathematical CERTAINTY!
Spherical Trigonometry dictates that this MUST EXIST
for any, and every 10 linear miles of earth's surface!

It don't matter if you are in Kansas or Maui, Minnesota or Texas,
Denmark or Japan, China or Mexico, it MUST HAVE 66.6 FEET of this supposed "curvature"

And BTW..... that goes for the WATER TOO!
The Gulf of Mexico MUST HAVE 66.6 FEET of "curvature" for every 10 linear miles of the water's surface!

Same goes for the Atlantic and Pacific oceans!
Same goes for the great lakes and Lake Tahoe!

Every 10 linear miles, in ANY DIRECTION must have it for the earth to actually be a sphere! So PUT UP OR SHUT UP!

LET'S SEE YOUR PROOF!