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Rotation de figures à 4 sommets -- 2 étapes (A)

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(1)

Rotations (A)

Dessinez l’image finale et les ´etapes interm´ediaires de la rotation d´ecrite.

0

Rotation dans le sens antihoraire de 90◦ autour du point (-4, -5).

Rotation dans le sens horaire de 90◦ autour du point (1, -5). -

x

6

y

         CCCC CCCC CCCC CCCC CC CCCC CCCC CCC          P P P P P P P P P

Rotation de 180◦autour du point (0, -3). Rotation de 180◦autour du point (-3, 0).

-

x

6

y

QQQ QQQQQQ QQQQQQQ QQQQQ                       

Rotation de 180◦autour du point (-5, 2). Rotation de 180◦autour du point (0, -4).

-

x

6

y

X X X X X X X X X X X X X X X X X X X X X X X X X C C C C C C C C C C C C C JJ JJ JJ JJ JJ JJ JJ JJ J

Rotation dans le sens antihoraire de 90◦ autour du point (1, -1).

Rotation dans le sens horaire de 90◦ autour du point (4, -2). -

x

6

y

PPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP ZZZZ Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z

MathsLibres.com

(2)

Rotations (A) Solutions

Dessinez l’image finale et les ´etapes interm´ediaires de la rotation d´ecrite.

0

Rotation dans le sens antihoraire de 90◦ autour du point (-4, -5).

Rotation dans le sens horaire de 90◦ autour du point (1, -5). -

x

6

y

         CCCC CCCC CCCC CCCC CC CCCC CCCC CCC          P P P P P P P P P JJ JJ JJ JJ JHHH H H H H H H H H H H H H H H H H H H H H H H H H H H                   CC CCCC CCCC CC CCCC CCCC CCCC CCCC C          P P P P P P P P P x x

Rotation de 180◦autour du point (0, -3). Rotation de 180◦autour du point (-3, 0).

-

x

6

y

QQQ QQQQQQ QQQQQQQ QQQQQ                        Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q                                           QQQQQQQQ QQQQQQ QQQQQQ Q                        x x

Rotation de 180◦autour du point (-5, 2). Rotation de 180◦autour du point (0, -4).

-

x

6

y

X X X X X X X X X X X X X X X X X X X X X X X X X C C C C C C C C C C C C C JJ JJ JJ JJ JJ JJ JJ JJ J XXXXXXXXXXXXXXXXXXXXXXXXX CCCCCC CCCCCC C J J J J J J J J J J J J J J J J J X X X X X X X X X X X X X X X X X X X X X X X X X C C C C C C C C C C C C C JJ JJ JJ JJ JJ JJ JJ JJ J x x

Rotation dans le sens antihoraire de 90◦ autour du point (1, -1).

Rotation dans le sens horaire de 90◦ autour du point (4, -2). -

x

6

y

PPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP ZZZZ Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z                                       PPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP ZZZZZZ Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z x x

MathsLibres.com

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