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Reem
@Reem
January 2021
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Bonsoir
Ex. 29 s.v.p
merci d'avance
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Verified answer
Bonjour
1ère façon
EFG réduction de ABC
coefficient = 4/5
hauteur = 4/5 × 7,5 = 6
base =
4/5× 6 = 24/5
aire du triangle
base × hauteur ÷2
=(6 × 24/5) / 2 = (144/5 )÷2
=(144/5 )×1/2
=144/10
=14,4 cm²
2ème façon
aire tu triangle ABC
= 6×7,5 /2
=22,5
aire de EFG
coefficient = (4/5)² =16/25
= 22,5 ×16/25
=14,4 cm²
1 votes
Thanks 1
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Lista de comentários
Verified answer
Bonjour1ère façon
EFG réduction de ABC
coefficient = 4/5
hauteur = 4/5 × 7,5 = 6
base =
4/5× 6 = 24/5
aire du triangle
base × hauteur ÷2
=(6 × 24/5) / 2 = (144/5 )÷2
=(144/5 )×1/2
=144/10
=14,4 cm²
2ème façon
aire tu triangle ABC
= 6×7,5 /2
=22,5
aire de EFG
coefficient = (4/5)² =16/25
= 22,5 ×16/25
=14,4 cm²