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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.
a pickle Your concern.
I don't think there is such a thing.
There is no such thing. One number is one number.Structures with more than one number include sets (if the sets happen to be made up of numbers), and ordered pairs.
Knowing the area doesn't give you enough information to answer that. The only thing you can tell is that the base and height multiply together to give 240, but you can't tell what either one is. There are an infinite number of possibilities.