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Sagot :

Bonjour,

On calcule les angles:

BEF = 180 - 60 -70 => 50°

GEF = 180 - 50 => 130°

EFH = 180 - 70 => 110°

FHG = 360 - 50 - 130 - 110 => 70°

BFE = FHG = 70°

BEF = EGH = 50°

Les droites EF et GH sont parallèles

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