The Five-Pointed Star






  
  

  

    5star.gif (973 bytes)
    Here
    you see a five-pointed star which has 5 triangles and a pentagon.

    

    1. Can you by adding two straight lines get
    10 triangles inside the star?

    

    2.
    Can you, by adding two straight lines, get exactly 10 separate triangles? 

    

    3. How many triangles can you count maximal, if you
    added two straight lines ?		
    

  

    5starb.gif (1887 bytes)
    

    

    Here you see a five-pointed star which has no lines inside.
4. Can you, by adding two straight lines, get 10 separate
    triangles? 

  

  

    

    Solution for 1 

    Solution
    for 2 

    Solution for 3                         
    Special Thanks to David Harry

   Solution for 4                         
    Special Thanks to Justin Leck		
    









The Large letter W







 






  

    largew.gif (2331 bytes)
    Draw a large
    letter "W" on a sheet of paper.  Now, by drawing three straight lines
    through the "W", try to generate 9 simple separate (no lines within) triangles.
  

  

    

    Puzzle Index		
    Solution