Create an illustration of arithmetic sequence using a polygon that you like. Explain why the illustration is an arithmetic sequence?

Answer 1

Try a triangle. 3 by 4 by 5

a1 =3

a2 =4

a3 =5

common difference =1

an= a1 + (n-1)d

= 3+(n-1) = n+2

a1 = n+2 = 1+2 =3

a2 =2+2 = 4

a3 = 3+2 + 5