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Tiffanie24
@Tiffanie24
January 2021
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Bonjour ! Je suis en 3ème et j'ai ces exercices à faire pour demain donc c'est URGENT s'il vous plaît ! Merci d'avance de vos réponses !
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ramzi13
1-a) AB× k=EF
2,8×k=2,1
k=2,1/2,8
k=0,75
..............................
b) EF=AC×0,75
EF=1,2×0,75
EF=0,9 cm
....................................
∧ ∧
c) DEF = BAC = 100°
...........................
2) k' × 2,1 = 2,8
k'= 2,8/2,1
k'= 28/21
k'= 4/3
1 votes
Thanks 1
Tiffanie24
Merci ! ^^
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2,8×k=2,1
k=2,1/2,8
k=0,75
..............................
b) EF=AC×0,75
EF=1,2×0,75
EF=0,9 cm
....................................
∧ ∧
c) DEF = BAC = 100°
...........................
2) k' × 2,1 = 2,8
k'= 2,8/2,1
k'= 28/21
k'= 4/3