De ronding van de aarde

$\eqalign{ & 2\pi r = 40000 \Rightarrow r \approx 6366 \cr & \angle M = \frac{{37,6}} {{40000}} \cdot 360^\circ = 0,3384^\circ \cr & \cos \left( {0,3384^\circ } \right) = \frac{{6366}} {{6366 + ST}} \cr & ST = \frac{{6366}} {{\cos \left( {0,3384^\circ } \right)}} - 6366 \cr & ST \approx 0,111 \cr & {\text{ST}}\,\,{\text{is}}\,\,{\text{ongeveer}}\,\,{\text{111}}\,\,{\text{meter}} \cr}$

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• Inzicht in ronding van de aarde