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Sum of the first odd numbers
Autor:
Vincent Pantaloni
Thema:
Addition
,
Zahlen
,
Folgen und Reihen
GIF
What is this ?
This is an original visual proof that :
The sum of the 1st n odd numbers is equal to n².
1+3+5+...+(2n-1)=n².
ggb applet
GeoGebra
Bigger GeoGebra applet with spheres
GeoGebra
GIF (HD)
Reboot of an older (bigger) version :
https://www.geogebra.org/m/mt8apr5e
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