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Un article trouvé pour ce sujet.
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Two-column proof for a circle geometry problem |
2007-08-24 |
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Kendra pose la question :
i have to prove that tangents to a circle at the endpoints of a diatmeter are parallel by stating whats given, whats to prove and a plane, then write a two column proof i dont understand this
Stephen La Rocque lui répond. |
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