[rookie1ja]

Open polygon - Back to the Logic Puzzles
Connect all 9 dots with 4 straight lines without lifting the pencil off the paper, and without going over the same line twice.

 9bodov.gif (1.1K)
Number of downloads: 18142

Spoiler for Solution:

Open Polygon - solution
 9bodov-solution.gif (3.17K)
Number of downloads: 18146

[imtcb]

E

[mannu]

|
| /
* * *
| /
* * *
| /
*__*__ *_


this way

[mannu]

I apologise if thats not clear ...thts bcoz i dont know how to draw it in this editor...

But to describe it in words, draw a line joining the pts at the left side of the array of points and then another one joining the last row......now extend the two lines a little. Now draw another line from here thru the 2nd and sixth point... The last one id drawn as a diagonal to the square formed by the array of dots...

[Fysh]

You didn't meet the requirements of the solution with an open polygon. There is a closed polygon and a line, but that doesn't make an open one.

[simplyhumble]

x - l

[coldone]

i did it this way
4....5
-*---*..* 2
..... /|
.*...*...*
../....|
.*...*...*
1.......| 3
1-2-3-4-5
just dot(.)= space( )

[bigskybuuck]

how about three vertical lines and one horizontal

[beck]

123
456
789

6-2-4-7-9

edit: bah, jumped ahead of myself. didn't use all 9

This post has been edited by beck: 30 January 2008 - 12:17 AM

[stevo1904]

1000020000300000
00 0
0 0 0
0 0 0
0 0 0
4 5 6
0 0 0
0 0
0 0 0
0 0 0
7 8 9
0 0
0 0
0 0
0 0
0

sorry about the diagram,did the best I could! anyway start at 1 draw a line thru 2 and 3 going past 3 far enough
to draw a 45 degree line thru 6 and eight extending past 8 to line up 7,4 and 1.draw a line thru 7,4,and 1.
now 45 deg. thru 1,5 and 9.
Had to do this for 5th grade math extra credit way back when,only you couldn't lift pencil from paper.