WEBVTT

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Mensen hebben altijd geweten

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dat bepaalde dingen langer zijn als 
andere dingen.

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Bijvoorbeeld: deze lijn lijkt

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langer dan deze lijn.

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Maar het is niet eerlijk om die 
vergelijking te maken

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Je wil het kunnen meten.

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Je wil weten 
hoeveel langer

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de tweede dan de eerste is.

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En hoe doen we dat?

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Nou, we pakken de eenheid lengte

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Dus als we dit onze 
eenheid lengte maken

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en we zeggen dit is 1 eenheid, 
dan kunnen we zeggen hoeveel eenheden

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deze lijnen zijn

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