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Trunchiul de con circular drept

Trunchiul de con circular drept. Aplicatia grupei 3. Prezentarea trunchiului de con circular drept. V. A’. o’. B’. o’. r. r. h. G. R. o. A. B. Desfasurarea trunchiului de con circular drept. r. o coroana circulara. G. doua discuri. R. Problema rezolvata.

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Trunchiul de con circular drept

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  1. Trunchiul de con circular drept Aplicatia grupei 3

  2. Prezentarea trunchiului de con circular drept V A’ o’ B’ o’ r r h G R o A B

  3. Desfasurarea trunchiului de con circular drept r • o coroana circulara G • doua discuri R

  4. Problema rezolvata Un trunchi de con circular drept are r=2cm, R=5cm si G=5cm. Calculati aria laterala, aria totala si volumul trunchiului de con. In trapezul dreptunghic A’Aoo’ construim A’M perpendicular pe Ao. Deoarece Mo=A’o’=2cm obtinem AM=3cm. Aplicand teorema lui Pitagora in triunghiul dreptunghic A’MA(cu masura unghiului M=900) obtinem h=A’M=4cm. 35 64 52 o’ A’ o’ A’ B’ 5 5 B o A o A M

  5. Va propunem spre rezolvare problema O galeata are forma unui trunchi de con circular drept.Madalina a masurat dimensiunile galetii si a obtinut: R=16cm, r =9cm si G=25cm..Incap in galeata 12 litri de apa?

  6. Bibliografie MANUALUL PENTRU CLASA A-8-A, EDITURA TEORA, AUTORI:CORNELIU SAVU,GINA CABA. CULEGEREA-MATE-2008/2009,EDITURA PARALELA 45, AUTORI:ANTON NEGRILA, MARIA NEGRILA. 

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