Question

HOW THE LINES OF LONGITUDES ARE MEASURED

Answer 1

Explanation:

Both longitude and latitude are angles measured with the center of the earth as an origin. A longitude is an angle from the prime merdian, measured to the east (longitudes to the west are negative). Latitudes measure an angle up from the equator (latitudes to the south are negative).

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Answer 2

Question ⤵️

HOW THE LINES OF LONGITUDES ARE MEASURED

Answer ⤵️

In 1530, mathematician Gemma Frisius proposed a method of calculating longitude with a clock: It would be set upon departure and kept at absolute time, which could be compared with the time upon arrival. ... As for longitude at sea, the movements of a ship made the accurate timing of eclipses impossible