Consider the following lines of Longitude and Latitude: 1. Prime Meridian 2. Tropic of Cancer 3. Equator Which of the above lines is/are a Great Circle?
- A. 1, 2 and 3
- B. 1 and 2 only
- C. 1 and 3 only ✓
- D. 3 only
Correct Answer: C. 1 and 3 only
Explanation
The Equator is the only latitude that is a Great Circle. All meridians of longitude (including the Prime Meridian) form halves of Great Circles, and paired with their antimeridians, they form full Great Circles. The Tropic of Cancer is a small circle.
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