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Rotation de figures à 4 sommets (A)

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(1)

Rotations (A)

Dessinez l’image de la rotation d´ecrite.

0

Rotation dans le sens horaire de 90

◦

autour du

point (0, -1).

-

x

6

y

((((((((((((((((((((((((((((((((((((((((((((((((((((((((( 

Rotation de 180

◦

autour du point (1, 0).

-

x

6

y

CC CC CC CC CC CC CC CC CC CC CC CC CC CC CC CC CC CC CC CC CC CC CC CC CC CC CC CCC((((((((((((((((((((((((((((((((((((((((@(@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c

Rotation dans le sens antihoraire de 90

◦

autour

du point (-3, 1).

-

x

6

y

A A A A A A A A A A A A A A A A A b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee e

Rotation dans le sens antihoraire de 90

◦

autour

du point (-4, -5).

-

x

6

y

l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l             XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

MathsLibres.com

(2)

Rotations (A) Solutions

Dessinez l’image de la rotation d´ecrite.

0

Rotation dans le sens horaire de 90

◦

autour du

point (0, -1).

-

x

6

y

(((((((((((((((((((((((((((((((((((((((((((((((((((((((((  EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE E B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B AA AA AA AA AA AA A x

Rotation de 180

◦

autour du point (1, 0).

-

x

6

y

CC CC CC CC CC CC CC CC CC CC CC CC CC CC CC CC CC CC CC CC CC CC CC CC CC CC CC CCC((((((((((((((((((((((((((((((((((((((((@(@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( @@ @@ @@ @@ @@ @@ @@ @@ @@ @@ @ cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc c x

Rotation dans le sens antihoraire de 90

◦

autour

du point (-3, 1).

-

x

6

y

A A A A A A A A A A A A A A A A A b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee e                                                   ,,, ,,,, ,,,, ,,, ,,,, ,,, ,,,, ,,,, ,,, ,,,, ,,,, ,,, ,,,, ,,, ,,, x

Rotation dans le sens antihoraire de 90

◦

autour

du point (-4, -5).

-

x

6

y

l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l             XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX @ @ @ @ @ % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % hhhhhhhhhhhhhhhhhhhhhhhhh         x

MathsLibres.com

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[r]

Sens de rotation

Le sens de rotation est « positif » lorsqu’on tourne dans le sens inverse des aiguilles d’une montre.. Le sens de rotation « négatif » lorsqu’on tourne dans le sens des