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Alain Ertveldt

  • Vive la Belgique (Anoir 1C1)

    Activity

    Alain Ertveldt

  • Rosace de Belgique (Clara)

    Activity

    Alain Ertveldt

  • Rosace de Belgique

    Activity

    Alain Ertveldt

  • Triangle et son cercle circonscrit

    Activity

    Alain Ertveldt

  • Positions relatives de 2 cercles

    Activity

    Alain Ertveldt

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