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Un article trouvé pour ce sujet.
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The bond angles of a tetrahedral polygon |
2001-03-14 |
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Nishi pose la question :
how do i prove (a simply as possible) why the bond angles of a tetrahedral polygon are 109.5 degrees? *i already have two explanations that i don't understand. one is about "theory of dot products" and "vectors" and a hook-like symbol w/ a cosine, and the other has an incomprhensible diagram w/ difficult notation- PLEASE BE SIMPLE! thanks sooo much
Harley Weston lui répond. |
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