If u have 3rows of dots with 3dots in each row how can u conect all the dots with4 lines without liftin ur pen

Answer 1

I know. Read below or click the link below it.

start with the bottow left then make a line toward the upper left dot hitting the middle left dot. do not stop on the upper left dot. continue until you can make a straight line hitting the upper middle dot and the middle right dot. continue the line until it's you can make a straight line back to the bottom left dot and hitting the all the lower dots at the same time. finally, make a diagonal line to the upper right dot hitting the middle dot. :) hope you get that.

http://img.photobucket.com/albums/v476/avalanchebreakdown/4dots.jpg

Answer 2

Since this is a math question area, I'm going to answer mathematically:

make your points (-1,1), (0,1), (1,0), (-1,0), (0,0), (1,0), (-1,-1), (0,-1), (1,-1).

Define f:R-->R^2 by the following piecewise parametric equations.
Start at point (-1,-1) and draw a line to (1,1) This is given parametrically by (x,y)=(t-1,t-1) where 0≤t≤2.
Now draw a line to (1,-2). This is given parametrically by (x,y)=(1,3-t) where 2≤t≤5.
Now draw a line to (-2,1), this is given by (x,y)=(6-t,t-7) where 5≤t≤8.
Finally draw a line to (0,1), this is given by (x,y)=(t-10,1) where 8≤t≤10.

To see that it is continuous, you must compare the two meeting functions at the points where they intersect (2,5,8):
f(2)=(2-1,2-1)=(1,1)
=(1,3-2)=(1,1) so t=2 is OK.
f(5)=(1,3-5)=(1,-2)
=(6-5,5-7)=(1,-2) so t=5 is OK
f(8)=(6-8,8-7)=(-2,1)
=(8-10,1=(-2,1) so t=8 is OK
Thus f is continuous (meaning, you didn't have to pick up the pen).

To see that it passes through every point:
f(0)=(-1,-1)
f(1)=(0,0)
f(2)=(1,1)
f(3)=(1,0)
f(4)=(1,-1)
f(6)=(0,-1)
f(7)=(-1,0)
f(9)=(-1,1)
f(10)=(0,1)

Thus it passes through every point.

here is a link of it flipped horizontally: http://www.puzzles.com/PuzzlePlayground/NinePoints/NinePointsSol.htm

Answer 3

you can, but lines have to go outside of the "sqaure" formed by the dots.

Start from bottom left dot,
1st line goes to top-right dot

2nd line goes down through bottom-right dot, and one more space down

3d line goes up-left through two dots and ends one space left of top-left dot

4th line goes right to top-right dot.

Answer 4

get 2 seperate sheets of paper. put the begining of the seperate sheet above and below the dots thats it

Answer 5

go outside of the box with your lines just dont pick up the pen