What is the nine dot puzzle?
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 do I unlock pattern lock?
Reset your pattern (Android 4.4 or lower only)
- After you’ve tried to unlock your phone multiple times, you’ll see “Forgot pattern.” Tap Forgot pattern.
- Enter the Google Account username and password you previously added to your phone.
- Reset your screen lock. Learn how to set a screen lock.
How are 9 circles different from 9 points?
The difference from above problem is that here there are 9 circles not 9 points. Also we can only draw 3 lines. The thing to notice is that since these are circles, not points, we can draw a line that is tangent to the circle. There is no need to pass the line through the center as the only contact with the circle is required.
How to connect 9 circles in a matrix?
Consider 9 circles each arranged at the center of cells of a 2-D matrix of shape 3*3. Draw 3 straight lines without removing pen from paper such that each of the 9 circles is in contact with at least one line. A similar problem is present here Connect 9 dots using 4 lines.
Can you draw 3 straight lines with 9 circles?
Draw 3 straight lines without removing pen from paper such that each of the 9 circles is in contact with at least one line. A similar problem is present here Connect 9 dots using 4 lines. The difference from above problem is that here there are 9 circles not 9 points. Also we can only draw 3 lines.
How do you solve the nine dot puzzle?
The Nine Dot Puzzle Use a pencil to draw four continuous straight line segments which go through the middle of all 9 dots without taking the pencil off the paper. Solution Start at A go to B then C then D then E You need to draw line segments that go beyond the dots to solve the problem A B D C E The 9 dot puzzle is an old puzzle.