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Rotation de figures à 4 sommets -- 3 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 horaire de 90◦ autour du point (-5, 0).

Rotation de 180◦autour du point (3, -2).

Rotation dans le sens horaire de 90◦ autour du point (2, -1). -

x

6

y

LL LL LL LL LL LL LL LL LL LL L T T T T T T T T T T T T T T T T T  

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

Rotation de 180◦autour du point (2, -4). Rotation de 180◦autour du point (-4, 1).

-

x

6

y

TT TT TT TT TT TT T a a a a a a a a a a a a a a a a a J J J J J (((((((((((((

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

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

Rotation dans le sens horaire de 90◦ autour du point (0, 2). -

x

6

y

         " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " %%% %%% %%% %%% %%% %%% %%% %%% %

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

Rotation dans le sens antihoraire de 90◦ autour du point (1, 3).

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

x

6

y

Q Q Q Q Q Q Q Q Q       

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 horaire de 90◦ autour du point (-5, 0).

Rotation de 180◦autour du point (3, -2).

Rotation dans le sens horaire de 90◦ autour du point (2, -1). -

x

6

y

LL LL LL LL LL LL LL LL LL LL L T T T T T T T T T T T T T T T T T   ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! """""" """""""""""HHHHH !!!!!!!!!!!!!!!!!"!"!"!"! """""" " " " " " " " H H H H H LL LL LL LL LL LL LL LL LL LL L T T T T T T T T T T T T T T T T T  x x x

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

Rotation de 180◦autour du point (2, -4). Rotation de 180◦autour du point (-4, 1).

-

x

6

y

TT TT TT TT TT TT T a a a a a a a a a a a a a a a a a J J J J J ((((((((((((( " " " " " " " " " " " " "  EEEE EEEE EEEE E """""""""""""      EE EE EE EE EE EE E " " " " " " " " " " " " "  EEEE EEEE EEEE E x x x

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

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

Rotation dans le sens horaire de 90◦ autour du point (0, 2). -

x

6

y

         " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " %%% %%% %%% %%% %%% %%% %%% %%% % HHHHHHHHH TT TT TT TT TT TT TT TT TT TT TT TT TT TT TT TT TT TT T 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 DD DD DD DD DD DD DD DD DD DD D   """"""""""""""""""""""""""""""""""""" % % % % % % % % % % % % % % % % % % % % % % % % % HHHHHHHHH TT TT TT TT TT TT TT TT TT TT TT TT TT TT TT TT TT TT T 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 DD DD DD DD DD DD DD DD DD DD D x xx

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

Rotation dans le sens antihoraire de 90◦ autour du point (1, 3).

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

x

6

y

Q Q Q Q Q Q Q Q Q        QQQQQQQQQ                      bbbb bbbbbbbbbb bbbbbbb QQQQQQQQQ                      x x x

MathsLibres.com

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