Educational Analog Clock Model
por lgbu
Ficheiros imprimíveis (7)
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stlHourHand.stl
107 Ko · 522 descargas
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stl
SecondHand.stl
108 Ko · 505 descargas
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stl
MinuteHand.stl
92 Ko · 519 descargas
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stl
ClockDial.stl
4.7 Mo · 561 descargas
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stl
TightHourHand.stl
107 Ko · 444 descargas
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stl
TightSecondHand.stl
108 Ko · 439 descargas
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stl
TightMinuteHand.stl
92 Ko · 445 descargas
Descrição
Educational Analog Clock
Update: Tried the clocks with some kids; they wanted the hands to be tight. So I added the tight version for the hands.
It is time to talk about “time” in mathematics, using the educational clock model with three hands. By default, the clock measures 120 mm in diameter. The three hands can be easily snapped on or off. There are two versions for the hands (loose and tight).
Of course, this is not a “working” clock, in the sense that the hands are NOT mechanically related to each other. Then, there are some advantages, too, especially when we want to think proportionally about the clock dial.
For example, how should we position the three hands so that it reads “3:45” ? What might be a wrong way to position the three hands?