semiminor axis

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semiminor axis

geometry

Learn about this topic in these articles:

Earth’s shape and dimensions

In geoid
…radius for Earth) and a semiminor axis (polar radius), or the flattening. Flattening (f) is defined as the difference in magnitude between the semimajor axis (a) and the semiminor axis (b) divided by the semimajor axis, or f = (a − b)/a. For Earth the semimajor axis and semiminor axis…
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