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A B C D E F (1) Citer deux vecteurs ´egaux `a

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2nd10 Interrogation 4A 9 octobre 2018 R´epondre aux questions sans d´emonstration.

Calculatrice interdite.

Nom et pr´enom : Exercice 1 :

ABCD etABEF sont des parall´elogrammes.

A

B

C

D E

F

(1) Citer deux vecteurs ´egaux `a−−→

AB.

(2) D´emontrer queCDF E est un parall´elogramme.

Exercice 2 :

Simplifier l’expression suivante :

−−→BD+−−→DA−−−→BC+−→AC

Exercice 3 :

Soit ABC un triangle.

A

B

C

(1) Construire les pointsDetE tels que : a. −−→

AD=−−→

BA b. −−→

CE=−−→

CB+−−→

CD (2) Quelle est la nature du quadrilat`ereBCDE? Justifier.

(2)

2nd10 Interrogation 4B 9 octobre 2018 R´epondre aux questions sans d´emonstration.

Calculatrice interdite.

Nom et pr´enom : Exercice 1 :

ABDC etABEF sont des parall´elogrammes.

A

B

D

C E

F

(1) Citer deux vecteurs ´egaux `a−−→

AB.

(2) D´emontrer queCDEF est un parall´elogramme.

Exercice 2 :

Simplifier l’expression suivante :

−−→AD+−−→DB−−→AC+−−→BC

Exercice 3 :

Soit ABC un triangle.

A

B

C

(1) Construire les pointsDetE tels que : a. −−→

AD=−−→

BA b. −−→

CE=−−→

CB+−−→

CD (2) Quelle est la nature du quadrilat`ereBCDE? Justifier.

Références

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