Question

Bantu hitung no 1 teman !

Answer 1

Pola 1 = 1
pola 2 = 1 + 2 = 3
pola 3 = 1 + 2 + 3 = 6
dst....

pola 10
= 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10
= 3 + 7 + 11 + 15 + 19
= 10 + 26 + 19
= 36 + 19
= 55 lingkaran