Take 1: 5 triangles - not bad for starters!
Take 2: A 4 triangle option
Take 3: 7 triangles - getting better
The challenge is pretty simple: how many triangles is it possible to make using 9 sticks? I have no idea, but the photos give you an indication of how I went about the task.
Take 4: I can spot 10 triangles
This logic activity can also be ongoing over several days. I like coming up with variations on a theme and asking children to do the same. For example, what differences would we discover if:
- We used 9 sticks of different lengths
- We used less than 9 sticks or more than 9 sticks - Is there a pattern to what we discover?
- We chose a different shape to create, e.g. a square
Take 5: If only I had moved the middle stick up a bit! 16 triangles
Take 6: I can count 18 triangles but I'm getting fuzzy eyes!
All-in-all it can be quite an absorbing task. I'm not sure this is the maximum number possible. If you better 18, I'd love to know how! Oh and add a link to the picture!