Question

There are 360 degrees of longitude at the equator. The length of a nautical mile initially represented 1/60 degree of longitude at the equator, and is quite close to that measurement today. About how many nautical miles is the circumference of the Earth at the equator?

Answer 1

this is a good one. draw it out

Answer 2

nautical mile =(1/60)/360 * 2 pi radius of earth

Answer 3

nautical mile *360*60/2pi =radius of earth

Answer 4

2 pi all of that gets circumference

Answer 5

?

Answer 6

Because it is already an arc length to arc length relatonship, you can look at it from the point 60 seconds in 1 degree, 360 degrees in one rotation.