Quantum redactiones paginae "Numerus triangularis" differant

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==Nexus externi==
* [http://blip.tv/file/54480 TriangularNumeri numberstriangulares] Pellicula PodCast a http://www.isallaboutmath.com
* [http://www.cut-the-knot.org/do_you_know/numbers.shtml#square Numeri triangulares] adapud [[cut-the-knot]]
* [http://www.cut-the-knot.org/do_you_know/triSquare.shtml Sunt numeri triangulares qui etiam sunt quadrati] adapud [[cut-the-knot]]
* [http://mathworld.wolfram.com/TriangularNumber.html Mathemundus]
 
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