Sum of the first odd numbers
- Author:
- Vincent Pantaloni
- Topic:
- Addition, Numbers, Sequences and Series
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
Bigger GeoGebra applet with spheres
GIF (HD)
