Seemyl: Verskil tussen weergawes

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Lyn 5:
'''Berekening van 'n seemyl:'''
 
* [[Diameter]] van die [[aarde]] by die [[ewenaar]] = 12 756 km
* [[Omtrek]] van die aarde by die ewenaar = π × 12 756 = 40 075 km
* 1 boogminuut = 60 [[boogsekondes]] = 1/60 grade = 1/60/360 omwentelinge