McGraw Hill Integrated II, 2012
MH
McGraw Hill Integrated II, 2012 View details
Study Guide and Review
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Exercise 37 Page 874

Yes, it is.

Practice makes perfect
Let's analyze figure Y on the given sphere.

We are asked if Y is a line in spherical geometry. A line in spherical geometry is a great circle. Since Y is a great circle, we can say that it is a line in spherical geometry.