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Espoir
@Espoir
April 2019
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Bonjour aide moi svp je comprends rien.
1) Tracer un cercle (C) de diamètre [AB] avec AB = 6cm. Construire un point D de (C) tel que AD = 4,6 cm
2) Déterminer la mesure de l'angle BAD arrondie au degré près.
3) Le point H est le pied de la hauteur issue de D .
Calculez une valeur approchée de la longueur DH.
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raymrich
Bonjour,
2)
cos angle(BAD) = 4,6/6 = 2,3/3 ⇒ angle (BAD) ≈ 40°
3)
DH = DAsin angle(BAD) = DAsin40° = 4,6x0,64 cm ≈ 2,94 cm
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Espoir
merci c'est gentil
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Lista de comentários
2)
cos angle(BAD) = 4,6/6 = 2,3/3 ⇒ angle (BAD) ≈ 40°
3)
DH = DAsin angle(BAD) = DAsin40° = 4,6x0,64 cm ≈ 2,94 cm