Transformations - 3e

Homothéties

Exercice 1 : Tracer une homothétie (rapport suppérieur à 1)

Tracer le triangle \(A'B'C'\) image du triangle \(ABC\) par l'homothétie de centre \(O\) et de rapport \( 4 \).

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Exercice 2 : Tracer une homothétie (rapport pouvant être négatif)

Tracer le triangle \(A'B'C'\) image du triangle \(ABC\) par l'homothétie de centre \(O\) et de rapport \( 3 \).

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Exercice 3 : Tracer une homothétie (rapport strictement positif)

Tracer le triangle \(A'B'C'\) image du triangle \(ABC\) par l'homothétie de centre \(O\) et de rapport \( \dfrac{1}{2} \).

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Exercice 4 : Donner le rapport d'une homothétie (rapport suppérieur à 1)

Donner le rapport de l'homothétie de centre \(O\) transformant le triangle \(ABC\) en le triangle \(A'B'C'\).

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Exercice 5 : Placer le centre d'une homothétie (rapport suppérieur à 1)

Placer le point \(O\) pour que le triangle \(A'B'C'\) soit une image du triangle \(ABC\) par l'homothétie de centre \(O\) et de rapport \( 3 \).

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