0
Anonymous
84 of them.
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14
Six triangles
only 1 lines can contain 3 collinear points. Maybe you mean coplanar?
Three
Points are collinear if they are on the same line.
64 triangles
The answer depends on how many points there are and how many triplets are non-collinear.
21
One! That is what collinear means!
10 collinear points form one set of overlapping line segments, of which there are 45.
3
Just one.