subject: Geometry
2007-06-16 21:00:53 · 3 answers · asked by erehwon jake p 1 in Science & Mathematics ➔ Mathematics
This is well-known.
It is basically a distorted 3 x 3 grid (which has 8 lines of three) that brings in 4 extra diagonals at the cost of losing 2 vertical columns. Net gain: 2 lines of 3 and an improvement from eight such lines of three to ten such lines of three.
1ooo2ooo3
oo4o5o6oo
7ooo8ooo9
We have three horizontal rows
1-2-3, 4-5-6 and 7-8-9
one vertical column
2-5-8
4 obvious diagonals
1-4-8, 8-6-3, 7-4-2 and 2-6-9
and 2 harder-to-spot diagonals
1-5-9 and 3-5-7
Ten lines of three in all
2007-06-16 22:29:52 · answer #1 · answered by Anonymous · 1⤊ 0⤋
It seems to me that you need at least 20 points to make 10 rows.
2007-06-17 04:47:21 · answer #2 · answered by Helmut 7 · 0⤊ 0⤋
email my friend aiko--asagusay@yahoo.com!
2007-06-17 04:05:48 · answer #3 · answered by Jhala Grace 1 · 0⤊ 0⤋