Triangular Numbers

1, 3, 6, 10… are called the triangular numbers because they can be stacked up to form a triangle. They are very interesting numbers, and they form a very interesting pattern when graphed.

Can you guess the next triangular number? Can you guess the shape of the graph of the triangular numbers? Can you explain that graph?

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.