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Rotation de figures à 5 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 de 180

◦

autour du point (1, 1).

Rotation de 180

◦

autour du point (-4, -1).

-

x

6

y

`````````````````````````````````BBB 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 B                                   @@ @@@

Rotation de 180

◦

autour du point (5, -4).

Rotation dans le sens antihoraire de 90

◦

autour

du point (1, 0).

-

x

6

y

S S S S S S S S S S S S S S S S S EEEE EEEE EEEE EEEE E SS SS SS SS S!!!!!!!!!!!!!!!!!!!!!

Rotation de 180

◦

autour du point (3, 2).

Rotation de 180

◦

autour du point (2, -1).

-

x

6

y

               Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z @ @ @ @ @ @ @ @ @ XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Rotation de 180

◦

autour du point (-4, 2).

Rotation dans le sens antihoraire de 90

◦

autour

du point (1, 4).

-

x

6

y

( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( (            @@ @@@ @@ @@ @@@ @@ @@ @    

MathsLibres.com

(2)

Rotations (A) Solutions

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

0

Rotation de 180

◦

autour du point (1, 1).

Rotation de 180

◦

autour du point (-4, -1).

-

x

6

y

`````````````````````````````````BBB 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 B                                   @@ @@@ ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` BB BB BBBB BBBB BBBB BBBB BB BBBB BBBB BBBB BBBB BBB    @ @ @ @ @ `````````````````````````````````BBB 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 B                                   @@ @@ @ x x

Rotation de 180

◦

autour du point (5, -4).

Rotation dans le sens antihoraire de 90

◦

autour

du point (1, 0).

-

x

6

y

S S S S S S S S S S S S S S S S S EEEE EEEE EEEE EEEE E SS SS SS SS S!!!!!!!!!!!!!!!!!!!!! SS SS SS SS SS SS SS SS S EEEE EE EE EE EE EE EE E S S S S S S S S S ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !     ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( (          LL LL LL LL LL LL LL LL LL LL L x x

Rotation de 180

◦

autour du point (3, 2).

Rotation de 180

◦

autour du point (2, -1).

-

x

6

y

               Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z @ @ @ @ @ @ @ @ @ XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX         ZZZ ZZ ZZ ZZ ZZ ZZ ZZZ ZZ ZZ ZZ ZZZ @@ @@ @@ @@ @ 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 X X X X X X X X X X X X X X X X X X X X                Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z Z @ @ @ @ @ @ @ @ @ XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX x x

Rotation de 180

◦

autour du point (-4, 2).

Rotation dans le sens antihoraire de 90

◦

autour

du point (1, 4).

-

x

6

y

( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( (            @@ @@@ @@ @@ @@@ @@ @@ @     (((((((((((((((((((((((((      @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @                  EE EE EE EE EE EE EE EE EE EE EE EE E ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ` ZZZ ZZZZZZZ ZZZZZZZ x x

MathsLibres.com

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