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2 articles trouvés pour ce sujet.
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An isosceles triangle |
2005-11-14 |
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Chris pose la question :
PX and QY are attitudes of acute triangle PQR, and Z is the midpoint of PQ. Can you write a proof that triangle XYZ is isosceles?
Chri Fisher lui répond. |
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A geometric proof |
2004-12-11 |
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Hanna pose la question :
Given: ABCD is a quadrilateral;
Prove: ABCD is a parallelogram
Penny Nom lui répond. |
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