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directrix |
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directrix [də′rek·triks] (mathematics) A fixed line used in one method of defining a conic; the distance from this line divided by the distance from a fixed point (called the focus) is the same for all points on the conic. A curve through which a line generating a given ruled surface always passes. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| Les voix de l'integration : des directrices de garderie au Canada parlent d'integration d'enfants a besoins particuliers. Le present article presente les lignes directrices qui ont ete validees avec le temps et decrit les modes d'apprentissage des enfants, leurs manieres de poser des questions, le rythme particulier de presentation, ainsi que ce qu'ils ont besoin d'apprendre. Lignes directrices sur les contaminants chimiques du poisson et des produits du poisson au Canada [in French]. |
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