Posted by **Urgent pls help** on Monday, March 18, 2013 at 2:56am.

A cube has 8 vertices. For each pair of distinct vertices, we connect them up with a line segment. There are

(8)

(2) =28

such line segments. For each of these 28 line segments, we mark the midpoint. How many distinct points have been marked as the midpoints?

- Math Geometry -
**Kishan**, Saturday, March 23, 2013 at 11:17pm
19

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