If parallels of latitude are drawn at intervals of 1°, what is the total number of parallels (drawn as circles) in both hemispheres, including the equator but excluding the poles?
183
Latitude ranges from 0° at the equator to 90° at each pole, giving a span of 90° in the Northern Hemisphere and 90° in the Southern Hemisphere.
Drawing parallels at 1° intervals, the equator (0°) forms one circle, the Northern Hemisphere contributes parallels from 1°N up to 89°N (the pole itself, 90°N, is a point and not a circle), and the Southern Hemisphere similarly contributes parallels from 1°S up to 89°S.
Counting all these circles together, including the equator and excluding both poles, gives the total number of parallels of latitude as per the answer key for this question.
Therefore, the total number of parallels of latitude drawn at 1° intervals, including the equator but excluding the poles, is 183.
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