Question

Find two triangular numbers after 21 and show each of 7 square
and 8 square as the sum of two triangular​

Answer 1

Answer:

Step-by-step explanation:

The Triangular Number Sequence is 1, 3, 6, 10, 15, 21, 28, 36, 45 and so on. It is formed by counting the dots in a triangle. From the sequence it is evident that the 8th and the 9th number is : 36 and 45. The sum is 36 + 45 = 81 which is the square root of 9.Jul 5, 2018

Answer 2

Answer:

the the triangular number sequence is1,3,6, 10, 15,21, 15 ,21, 28, 36, 45and so on