My reference was to the fact that an hour on a bus will get you pretty much anywhere you want to go in Brisbane it was time equating to distance thing ed. As to what pythagoras' theory has to do with that you may wish to enlighten me :huh:

I'll bring a Kent set to the case swap to explain

About 15 years ago I failed to pay my rego, got picked up and ended up doing six weeks of community service (edit, six days - we aren't America yet) which was actually quite enjoyable, I was enslaved to a groundsman at a primary school in Redcliffe and did mowing, emptying bins etc. We had to mark out the sportsfield for the sports day and he wondered how we could get it perfectly rectangular so I suggested that, starting with the desired lengths of the sides of the sports field, we use the theorem of Pythagoras to determine the diagonal (i.e Hypotenuse) , then using ropes and star posts, fine tune the sides till they were accurate.

What a good little exercise to chuck at grade 7 maths so they could work it out for us.

None of the teachers had heard of the theorem of Pythagoras. Not one.