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dau 20 puncte si coroana​

Dau 20 Puncte Si Coroana class=

Răspuns :

Răspuns:

Salut

Formula:

A=πR²

a)R=10m =>Aria=π•10²=100π m²≈314,16m².

b) R=2 3/4 m => (2•4+3)/4=11/4

Aria=π•(11/4)²=121π/16m²≈23,76m².

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