3
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Ka d e 6
METEN EN METEND REKENEN LES 14 Omtrek van een cirkel
d
r
omtrek van de cirkel
met π = pi = 3,14
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d = diameter
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r = straal
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1
Bereken de omtrek van de cirkel. Noteer telkens de formule.
40 m
5 dm
20 m
omtrek: _________________________________
omtrek: _________________________________
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1,7 dm
28
2,2 cm
omtrek: _________________________________
omtrek: _________________________________
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