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madoline
@madoline
January 2021
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Bonjour, pouvez-vous m'aider pour les éxercices 2 et 3 s'il vous plaît ?
Merci.
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no63
Salut
exo 1
1)
V_1= (1/3)(c²*h)
V_1= (1/3)*36*8= 96 cm^3
SMNPQ est une réduction de SABCD de coefficient SI/SO
coefficient de réduction= 2/8= 1/4
2) V_2= 96*(1/4)^3
V_2= 3.55 cm^3
exo 2
Volume= (1/3)*pi*r²*h
1) V_1= (1/3)*pi*5²*8 = 209.44 cm^3
2) a) la section est un cercle
b) coefficient de réduction = SM/SO= 3/8
le rayon est
r= 5*(3/8)= 1.875
3) V_2= (1/3)*pi*1.875²*3= 11.04 cm^3
ou
V_2= 209.44* (3/8)^3 = 11.04 cm^3
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exo 1
1)
V_1= (1/3)(c²*h)
V_1= (1/3)*36*8= 96 cm^3
SMNPQ est une réduction de SABCD de coefficient SI/SO
coefficient de réduction= 2/8= 1/4
2) V_2= 96*(1/4)^3
V_2= 3.55 cm^3
exo 2
Volume= (1/3)*pi*r²*h
1) V_1= (1/3)*pi*5²*8 = 209.44 cm^3
2) a) la section est un cercle
b) coefficient de réduction = SM/SO= 3/8
le rayon est
r= 5*(3/8)= 1.875
3) V_2= (1/3)*pi*1.875²*3= 11.04 cm^3
ou
V_2= 209.44* (3/8)^3 = 11.04 cm^3