I have a problem: I have a mild case of OCD, causing me to hate untidiness. This is obviously a much bigger problem with little nippers running around constantly leaving clothes lying about and never putting toys away when they’ve finished with them. One particular area where it manifests is whenever I eat a packet of crisps (or potato chips to American readers) I can’t just throw the bag away, that would be far too untidy. I have to fold in neatly so it takes up as little space as possible in the trash. I don’t know why, I just can’t help it. Maybe it’s just something for my fingers to do? Over the years I have moved on from the “standard” right-angled isosceles triangle and expanded into a nice equilateral triangle as well as square and pentagon versions.
Now whenever we eat crisps, or other treats that use similar packaging, my daughter (and her friends) come up to me and request a triangle. Whilst building them I quiz the kids on the shapes — how many sides does a pentagon have? What is special about an equilateral triangle? What is a right angle? I then sit back and marvel at their imagination as I watch and listen to the games and stories such a simple thing can lead them into. It’s all good, silly fun, and if you’ve ever wanted to make them for yourself then read on.
First up, the “standard” Right-angled isosceles triangle:
- First lay your packet flat and fold it into thirds lengthways.
- About halfway along, fold one end over at 90 degrees.
- Now wrap one end back around under the first fold, making an L shape.
- Then fold it around again to line up with the other end.
- Turn the Step 5 over and fold both ends into a triangle to mirror the first part.
- Fold the large triangle in half and bend the second part so that it slides inside the first.
- Make sure it’s tucked right inside and then flatten it down. Now you’re ready for a game of Paper Football. Now, if you’re still with me and not too bored, let’s move on to the equilateral triangle.