That point is in Ethiopia, about 75 miles south-southeast of Dese,
and 110 miles northeast of Addis Ababa.
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40 degrees
Beijing Airport
40 n 90 e country
20 Degrees N.
if the exterior angle is 40 degrees the interior angle of the polygon is 180- 40 = 140 degrees. The equation for sides N is interior angle = 180 x (N-2)/N; solving you find N = 9 sides