Can you connect all 9 dots with 4 straight lines?

One classical example is where nine dots are arranged on the sides and the center of a square as in the picture below. The problem is to connect the dots with no more than 4 straight lines without lifting your hand from the paper. The solution lies in the observation that it’s permissible to cross square boundaries.

How many lines do you need to connect 9 dots?

four
The nine-dot problem is a well-defined problem. It has a clearly stated goal, and all necessary information to solve the problem is included (connect all of the dots using four straight lines, without removing the pen from the paper once you start drawing).

How do you join the dots?

In adult discourse the phrase “connect the dots” can be used as a metaphor to illustrate an ability (or inability) to associate one idea with another, to find the “big picture”, or salient feature, in a mass of data.

Can you connect the dots?

You can’t connect the dots looking forward; you can only connect them looking backwards. So you have to trust that the dots will somehow connect in your future.

How many ways can you connect the dots?

By brute-forcing with pencil and paper, I found that there are 5 ways to connect sets of 2 vertices (dots) such that no two lines intersect inside the hexagon.

What is the 9 dot challenge?

The nine-dot problem (Maier, 1930) requires that nine dots arranged in a square be connected by four straight lines drawn without lifting the pen from the paper and without retracing any lines (Figure 1).

How to join 9 dots with 4 straight lines?

Your task is to join the 9 dots with 4 straight lines, without lifting the pen. Join the 9 dots with 3 straight lines without lifting th pen. So this problem doesn’t need hard work or calculation…. it just needs the smart way of thinking outside the box…

Which is a problem for the nine dots starting point?

Another well-defined problem for the nine dots starting point is to connect the dots with a single straight line.

Can a line of sufficient thickness connect all the dots?

A line of sufficient thickness can connect all the dots (by covering them)$\\endgroup$– March HoJan 13 ’15 at 7:28 | Show 6more comments 3 Answers 3 ActiveOldestVotes 46 $\\begingroup$

Which is bigger a line or a dot?

As it mentioned in previous question, lines are infinitesimal. Which means without any restriction on dots height, dots are bigger than lines. To show my method easily, here is a picture of the solution with 3×3 dots. If you can draw a line that meets all 7 dots in a row with appropriate angle you can basically cover all dots with 7 lines.

https://www.youtube.com/watch?v=C-2W5DFgUxA