Tiziano Rovelli
81
Semplici aree e volumi
• cerchio: Circonferenza = 2∙π∙r;
                Area = π∙r2 
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• cilindro: Superficie lat. = 2∙π∙r∙l,
                Volume = π∙r2∙l;
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• sfera: Area = 4∙π∙r2 ,
            Volume = 4/3∙π∙r3.
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