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ItsHomeworks
@ItsHomeworks
May 2019
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Coucou sa ne vous déranger pas de m'aider en math? Haha :) merci d'avance :) n'hésitez à demander une autre photo si vous ne voyez pas très bien, merci encore d'avance haha :) Ex 29
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Bonjour,
a) A base carré = 50cm²
A d'un carré = c²
c² = 50
c = √50 = 5√2
ABC rectangle en B
AC² =AB²+BC²
= (5√2)²+(5√2)²
AC = √100 = 10cm
b) ASH rectangle en H
SA² =AH²+HS²
13² = 5²+HS² (AH=1/2AC -demi-diagonale)
HS² = 13²-5²
HS = √144 = 12cm
V = 1/3(50*12) = 200cm^3
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Verified answer
Bonjour,a) A base carré = 50cm²
A d'un carré = c²
c² = 50
c = √50 = 5√2
ABC rectangle en B
AC² =AB²+BC²
= (5√2)²+(5√2)²
AC = √100 = 10cm
b) ASH rectangle en H
SA² =AH²+HS²
13² = 5²+HS² (AH=1/2AC -demi-diagonale)
HS² = 13²-5²
HS = √144 = 12cm
V = 1/3(50*12) = 200cm^3