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	How many kilometers to a longitudinal degree?		2014-06-19
		cherrielyn pose la question : Assuming that earth is a sphere of radius 6380 km, what is the difference in the latitudes of two cities 270 miles apart positioned on the same meridian? Thank you in advanced po! :) Robert Dawson lui répond.
	The difference in the latitudes of Lynchburg and Myrtle Beach		2012-01-26
		Sarah pose la question : Assuming that the earth is a sphere of radius 6378 kilometers, what it is the difference in the latitudes of Lynchburg, Virginia and Myrtle Beach, South Carolina, where Lynchburg is 400 kilometers due north of Myrtle Beach? Robert Dawson lui répond.
	Great circle course		2012-01-25
		Hervé pose la question : On the earth, the mathematical formula giving the distance between two points, and the initial course for a boat on the great circle is well known. I need to find the inverse formula, ie knowing an initial position on earth, and the initial course of the boat, and the distance to run on the great circle, the formula gives the final position (longitude and latitude). Robert Dawson lui répond.
	The difference in latitudes of two cities		2012-01-18
		Renee pose la question : Assuming that the earth is a sphere of radius 6378 kilometers, what is the difference in latitudes of two cities, one of which is 600 kilometers due north of the other? Robert Dawson lui répond.
	The leaning tower of Pisa		2009-08-09
		MF pose la question : Would you have any idea how the 'latitude of 44 degrees N" has anything to do with this question and how I would apply it? The leaning tower of Pisa leans toward the south at an angle of 5.5 degrees. One day near noon its shadow was measured to be 84.02 m long and the angle of elevation from the tip of the shadow to the top of the tower was measured as 32.0 degrees. To answer the question, assume that the tower is like a pole stuck in the ground, it has negligible width. Also, it is important to know that Pisa Italy is at a latitude of approx 44 degrees North because this affects the direction of the shadow.) Stephen La Rocque lui répond.
	Finding the Distance Between Two Latitudes		2008-10-02
		Samua pose la question : Assuming that the Earth is a sphere of radius 4000 miles and that the cities are on the same longitude (one city is due north to the other). Find the distance between the cities with the latitudes of 37 degrees 47'36'' and another city with 47 degrees 37'18''. Heeeeeeeeeeelp! Janice Cotcher lui répond.
	Great circles		2007-11-05
		Lindsay pose la question : Does a sphere have only ONE great circle? Explain? Stephen La Rocque lui répond.
	Finding the center of a circle that goes through three given points		2007-09-16
		Gary pose la question : I am given three points represented by their Latitude and Longitude. How do I determine the Latitude and Longitude of the center of a circle through the three given points? The lat/lon of the three points are: A. N 43 degrees 30.251 min. W 96 degrees 45.695 min. B. N 43 degrees 30.006 min. W 96 degrees 45.082 min. C. N 43 degrees 30.719 min. W 96 degrees 45.410 min. Thanks. Stephen La Rocque lui répond.
	Difference in latitude		2005-04-05
		Gretel pose la question : Assuming the the earth is a sphere of radius 6378 kilometers, what is the difference in latitude of two cities, one of which is 400 kilometers due north of the other? 500 kilometers? Penny Nom lui répond.

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