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lalalouise
@lalalouise
January 2021
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Bonjour, j'ai du mal avec un DM, Merci d'avance pour votre aide
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laurance
1)TR=AB - 2x donc
2x= AB-TR = 6rac(2) -2 -rac(8)=6rac(2)-2-2rac(2)=4rac(2)-2
donc x=2rac(2)-1
2)aire = AB² - TR² = (AB-TR)(AB+TR)= (4rac(2) -2) (8rac(2) -2)
= 64 - 8rac(2)-16rac(2) +4 = 68 - 24rac(2)
3)perimetre =4AB + 4TR = 4(AB+TR)= 16rac(2) -8
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lalalouise
January 2021 | 0 Respostas
Bonjour, j'ai du mal avec un DM, Merci d'avance pour votre aide
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2x= AB-TR = 6rac(2) -2 -rac(8)=6rac(2)-2-2rac(2)=4rac(2)-2
donc x=2rac(2)-1
2)aire = AB² - TR² = (AB-TR)(AB+TR)= (4rac(2) -2) (8rac(2) -2)
= 64 - 8rac(2)-16rac(2) +4 = 68 - 24rac(2)
3)perimetre =4AB + 4TR = 4(AB+TR)= 16rac(2) -8