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ACTIVITES N°2

ACTIVITES N°2. Propriété de Thalès (Fiche élève N°2). Cliquez sur le schéma pour la solution…. 7  15. 4  5. 4  7,5. 6  12. 6  12. =. =. =. =. =. 10,5. 6. 5. 9. 8. 2,1  7. 14  7,5. 3  4. =. =. =. 3. 10,5. 2,4. 6  36. 7,8  6,5. 7  9,9. =. =. =.

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ACTIVITES N°2

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  1. ACTIVITES N°2 Propriété de Thalès (Fiche élève N°2)

  2. Cliquez sur le schéma pour la solution…

  3. 7  15 4  5 4  7,5 6  12 6  12 = = = = = 10,5 6 5 9 8 2,1  7 14  7,5 3  4 = = = 3 10,5 2,4 6  36 7,8  6,5 7  9,9 = = = 4,5 6 11 4,7  32,76 = 6,3 6 9 3,33 8 10 5 10 6,3 24,44 8,45 48 4,9 3,33 10 8 6 4,9 10 5 9 48 8,45 6,3 24,44

  4. SOLUTIONS (Cliquez sur le numéro de l’exercice)      

  5. MN AN AM = = BC AC AB AN 5 6 6 7,2 (MN) // (BC) 7,2 ? 5 6 (Théorème de Thalès)

  6. BC AC AB = = MN AN AM 2,5 2 10 8 AN (BC) // (MN) 8 ? (Théorème de Thalès) 2 2,5

  7. DF DE EF = = IJ DJ DI 8 7 9,6 DJ 8,4 (EF) // (IJ) 8,4 7 (Théorème de Thalès) 8 ?

  8. LB LA AB = = MN LN LM 3 2 12 MN 18 (AB) // (MN) 2 3 ? (Théorème de Thalès) 18

  9. KB KA AB = = LI KI KL 9 AB 13,5 16,5 11 16,5 (AB) // (LI) ? 11 9 (Théorème de Thalès)

  10. ON OM MN = = IJ OJ OI 1,5 MN 1,1 6 4,4 4,4 (MN) // (IJ) ? 6 1,5 (Théorème de Thalès)

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