Question

Cuantas diagonales tienen los poligonos de 25, 26, 27, 28, 29 y 30 lados ??

Answer 1

Fórmula=n(n-3)/2
25(25-3)/2=25*22/2=275
26(26-3)/2=26*23/2=299
27(27-3)/2=27*24/2=324
28(28-3)/2=28*25/2=350
29(29-3)/2=29*26/2=377
30(30-3)/2=30*27/2=405