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3 articles trouvés pour ce sujet.
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The midpoints of two sides of a triangle |
2009-03-17 |
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Manis pose la question :
Prove that the line joining the midpoint of two sides of a triangle is parallel to the third and half of it.
Robert Dawson lui répond. |
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A plane cuts a line segment |
2009-03-17 |
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Manis pose la question :
Find the ratio in which the line joining (2,4,16) and (3,5,-4) is divided by the plane 2x-3y+z+6=0.
Robert Dawson lui répond. |
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A sphere in a cube |
2006-11-09 |
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Lukas pose la question :
Given a cube and a cross diagonal, what is the largest size sphere that fits in the cube and does not touch or intersect the cross diagonal?
Steve La Rocque, Penny Nom and Walter Whiteley lui répond. |
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