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Lines and Dots

Investigation PowerPoint Presentation

Lines and Dots

A simple (hand-shaking type) investigation based on a set of Mystic Roses. Students may or may not already be familiar with the sequence of triangular numbers and some groups may be aware of the general formula. The slight complication here of course is that the L = (p -1)p/2.
Obviously it is a matter of tailoring the presentation to suit the particular group. You may wish to add in formulas etc as you see fit. Low ability groups can still get quite a bit out of it and if all else fails slide 8 will keep them occupied (and hopefully thinking).
The 18 point Mystic Rose is animated and draws itself very quickly line by line. Looks brilliant on the Whiteboard.
Printable worksheets are available at slides 6 and 7 should you wish to use them.
There is more advanced work on triangular numbers in the presentation “Stairs and Steps”.

Slides Animation Sound Worksheets Rating
7 y y y rating


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