Question

what square number will we get if we add (a) 8th and 9th triangular number (b) 13th and 14th triangular number​

Answer 1

Answer:

hope this helps you

Step-by-step explanation:

a) 36 + 45 = 81 ($9^{2}$)

b) 91 + 104 = 196 ($14^{2}$)