Question

Look at the figure.



Which statement is true?
Answer
Circle 2 and Circle 3 are concentric.
Circle 1 and Circle 3 are concentric.
Circle 3 is a great circle of the sphere.
Circle 4 is a great circle of the sphere.

Answer 1

Circle 4 is a great circle of the sphere.
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A great circle of a sphere is a circular cross section of the sphere and has the center of the sphere as its radius.
Concentric circles have to lie in the same plane. No concentric circles are shown in the diagram.

Answer 2

thanks