Transformations - 4e

Rotations

Exercice 1 : Identifier un triangle de nature quelconque après rotation de 180 degrés.

Trouver la figure dans lesquelle \( A'B'C' \) est l'image du triangle \( ABC \) par la rotation de centre \( O \) suivant un angle de \( 180 °\) dans le sens inverse des aiguilles d'une montre.

Exercice 2 : Identifier un triangle de nature quelconque après rotation de 90 degrés.

Trouver la figure dans lesquelle \( A'B'C' \) est l'image du triangle \( ABC \) par la rotation de centre \( O \) suivant un angle de \( 90 °\) dans le sens inverse des aiguilles d'une montre.

Exercice 3 : 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 4 : Tracer l'image d'un quadrilatère par une rotation (90°, 180° ou 270°)

Tracer l'image du quadrilatère \(ABCD\) par la rotation de \(180°\) dans le sens horaire de centre \(O\).

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

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

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