Transformations - 3e

Rotations

Exercice 1 : Tracer l'image d'un quadrilatère par une rotation (90°, 180° ou 270°)

Tracer l'image du quadrilatère \(ABCD\) par la rotation de \(90°\) dans le sens antihoraire de centre \(O\).

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Exercice 2 : Lien part de tour - angle

Pour mettre sa montre à l'heure, Erika fait tourner la grande aiguille de deux tiers de tour.
De quel angle la grande aiguille a-t-elle été tournée ?

Exercice 3 : Tracer l'image d'un triangle par une rotation (90°, 180° ou 270°)

Tracer l'image du triangle \(ABC\) par la rotation de \(90 °\) dans le sens horaire de centre \(O\).

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Exercice 4 : Tracer l'image d'une figure par une rotation (90°, 180° ou 270°)

Tracer l'image de la figure suivante par la rotation de \(270 °\) dans le sens antihoraire de centre \(O\).

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Exercice 5 : Tracer l'image d'un point par une rotation (90°, 180° ou 270°)

Tracer l'image du point \(B\) par la rotation de \(180 °\) dans le sens antihoraire de centre \(O\).

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