Sur la figure ci-dessous, les droites \( (\mathrm{AB}) \) et \( (\mathrm{CD}) \) sont parallèles. La droite \( (\mathrm{GH}) \) coupe \( (\mathrm{AB}) \) en \( \mathrm{F} \) et \( (\mathrm{CD}) \) en \( \mathrm{E} \). Donner la mesure de chacun des angles suivants et expliquer: 1) \( \widehat{\mathrm{EFB}} \) 2) \( \widehat{\mathrm{HED}} \) 3) \( \widehat{\mathrm{FED}} \) 4) \( \widehat{G F A} \)
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Since \( (\mathrm{AB}) \) and \( (\mathrm{CD}) \) are parallel, these angles are alternate interior angles and therefore equal. So, \( \widehat{\mathrm{EFB}} = \widehat{\mathrm{HED}} \). Show more…
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