Definition:Semi-Great Circle
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Definition
Let $S$ be a sphere.
A semi-great circle on $S$ is a semicircle consisting of half of a great circle on $S$.
Sources
- 1976: W.M. Smart: Textbook on Spherical Astronomy (6th ed.) ... (previous) ... (next): Chapter $\text I$. Spherical Trigonometry: $4$. Terrestrial latitude and longitude.