A list of Square Numbers are 1, 4, 16, 25, 36, 49, 64, ... Do they look familiar? Below is one way to make Square Numbers from combining two Triangular Numbers. Neat!

Square Numbers

_Here's an example of how to make a square number from two triangular numbers.

6 + 10 = 16

Can you draw a similar picture to make 36 and 49? What Triangular Numbers would you use?