Chat with our AI personalities
If you asking where you'd find them in the real world - Binoculars and telescopes are two examples.
There is no such thing as a "triangular" number (as a number), a triangular number or triangle number counts the objects that can form an equilateral triangle. One object can and Three objects can but not Two objects.
prism
A triangular number or triangle number counts the objects that can form an equilateral triangle. 10 objects can be formed into an equilateral triangle.
honeycomb