In inversion,we extend the euclidean plane by adding a single point at infinity which lies on all the lines.But doesn't that mean lines can intersect twice?I mean non parallel lines already intersect once but then again the point at infinity lies on both of them,making $2$ intersections?Is this allowed?How do we see it intuitively?
2026-03-25 23:51:03.1774482663
Can lines intersect twice?
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