An diofar eadar na mùthaidhean a rinneadh air "Cruinne"

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Loidhne 22:
 
Tha farsaingeachd uachdar na cruinne le radius ''r'' air a thoirt le 4&pi;''r''<sup>2</sup>, agus tha a tomad air a thoirt le 4&pi;''r''<sup>3</sup>/3.
 
[[Category:Cruthan]]
[[Category:Matamataigs]]
 
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