[Squeakland] More thoughts - Re: Demoing Etoys to kids
ducasse at iam.unibe.ch
Sun Aug 12 12:11:35 PDT 2007
I always liked the way ancient measured pyramid using the shadow of a
know piece of wood and use Thales theorem.
At least it was a really practical example, I used to teach Thales
> For example, if we occlude a quarter with a dime and measure this
> carefully, we see that the distance in diameters has to be the same.
Now I do not understand the "distance in diameters"
> And if we then occlude the moon with a coin (as Aristarchos of
> Samos indeed did!) we will find that it takes about 110 coin
> diameters, and this means that the moon is 110 moon diameters away
> from us!
How do we get 110?
> Children love this (too bad adults don't, or they would know about
> this and teach it to children).
Some do :)
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