Consider the spheres shown in the figure. The sphere at the left shows two lines. In Euclidean geometry, we know that two lines are either parallel or cross at exactly one point. Discuss this property in relation to what you observe in the figure.
A) Two lines intersect in two points.
B) Two lines are either parallel or cross at exactly two points.
C) Lines are great circles, and m is not a great circle.

Question

Consider the spheres shown in the figure. The sphere at the left shows two lines. In Euclidean geometry, we know that two lines are either parallel or cross at exactly one point. Discuss this property in relation to what you observe in the figure. 
A) Two lines intersect in two points. 
B) Two lines are either parallel or cross at exactly two points. 
C) Lines are great circles, and m is not a great circle.

Quizplus · Accepted Answer

The Answer of Consider the spheres shown in the figure. The sphere at the left shows two lines. In Euclidean geometry, we know that two lines are either parallel or cross at exactly one point. Discuss this property in relation to what you observe in the figure. 
A) Two lines intersect in two points. 
B) Two lines are either parallel or cross at exactly two points. 
C) Lines are great circles, and m is not a great circle.

Consider the Spheres Shown in the Figure