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Abipipoune06
@Abipipoune06
April 2019
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Bonjour besoin d'aide svp ! Le sujet et sur la pièce jointe
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sofi3662
Ac²=ab²+bc² soit ac²=3²+4²=9+16=25 soit ac =5
ao=ac/2 soit 2.5
sa=10 soit sa² =ao²+os² donc 100-(2.5)²=0s² 100-6.25=os²
os =9,68
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abipipoune06
Merci bcp cela ma aidé a comprendre :-) !
eivmam
1) AC^2=AB^2+BC^2=3^3+4^2=9+16=25
Donc AC=5cm
AO=AC/2=2,5cm
2) AS^2=SO^2+AO^2
Donc SO^2=AS^2-AO^2=10^2-2,5^2=100-6,25=93,75
Donc SO=9,68cm
3) V=(1/3)*AB*BC*SO=(1/3)*3*4*9,68=38,729cm^3
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Lista de comentários
ao=ac/2 soit 2.5
sa=10 soit sa² =ao²+os² donc 100-(2.5)²=0s² 100-6.25=os²
os =9,68
Donc AC=5cm
AO=AC/2=2,5cm
2) AS^2=SO^2+AO^2
Donc SO^2=AS^2-AO^2=10^2-2,5^2=100-6,25=93,75
Donc SO=9,68cm
3) V=(1/3)*AB*BC*SO=(1/3)*3*4*9,68=38,729cm^3