If the Earth's circumference is approximately 21,600 nautical miles, how many nautical miles are in one degree of arc?

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Multiple Choice

If the Earth's circumference is approximately 21,600 nautical miles, how many nautical miles are in one degree of arc?

Explanation:
Distance in nautical miles per degree is found by dividing the total circumference by 360 degrees. With a circumference of 21,600 nautical miles, one degree of arc equals 21,600 ÷ 360 = 60 nautical miles. This also matches the familiar rule that one degree of latitude corresponds to 60 nautical miles, and one minute of latitude to 1 nautical mile. The other options would require a different total circumference to hold true.

Distance in nautical miles per degree is found by dividing the total circumference by 360 degrees. With a circumference of 21,600 nautical miles, one degree of arc equals 21,600 ÷ 360 = 60 nautical miles. This also matches the familiar rule that one degree of latitude corresponds to 60 nautical miles, and one minute of latitude to 1 nautical mile. The other options would require a different total circumference to hold true.

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