Why do this
problem?
This challenge is accessible to all pupils - everyone can have
a go - but explaining why it is impossible with certain shapes is
more difficult. It is a good context in which to encourage pupils
to make conjectures and to verify them.
Key questions
Do you have a system fortrying to trace over the
diagonals?
What do the shapes that work have in common?
Which other shapes do you think it will work for?
Possible extension
Possible support
This
sheet , with six of each shape and their diagonals drawn, will
be useful to print off for some pupils.