That all depends on where you are relative to the equator and either one of the poles.
The lines of longitude all come together at the north and south poles ... if you see a globe with longitude lines on it, it looks like the sections of an orange.
At the equator, 1 degree of longitude is roughly 69 miles. From there, it tapers down to zero at either pole.
Math: At any latitude, the distance covered by one degree of longitude is
(about 69 miles) multiplied by (the cosine of the latitude).
That's like asking "How many feet are there in one length ?"
The "longitude" of a place is an angle. You can measure it and describe it
in any angle units. "Degree" is one possibility of something to use.
Hawaii
Yellowstone.
37 deg 20' N latitude, 121deg 53' W longitude.
Using Berlin, Germany as a starting point, Germany's longitude is 13 deg. 24 min. E.
I can see 7.8213° of longitude.
Hawaii
26 deg South and 28 deg East
55 deg 52 min N, 4 deg 15 min W
Pretoria lies at approximately 28 deg 11 minutes longitude.
Yellowstone.
37 deg 20' N latitude, 121deg 53' W longitude.
Using Berlin, Germany as a starting point, Germany's longitude is 13 deg. 24 min. E.
Taiwan, officially called the Republic of China, is a country in East Asia. Its geographical coordinates are 25 deg 03 min N latitude and 121 deg 30 min W longitude .
That point is about 28 miles southwest of San'a, in western Yemen.
The intersection of the equator (0 deg N) and the 180 deg longitude. At the equator and North of it the longitude is the International Date Line (IDL). At their intersection the IDL goes East to include Kiribati in the "Eastern" hemisphere.
I can see 7.8213° of longitude.
As wide as my ass:)