They do not exist since there is no such word as triangula.
Triangular numbers, on the other hand, are numbers that form the sequence
1, 1+2, 1+2+3, 1+2+3+4 and so on.
The nth term of this sequence, 1, 3, 6, 10, ... is generated by the rule
Un = n*(n+1)/2 where n = 1, 2, 3, ...
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triangula prism
They are whole numbers,counting numbers,integers,rational numbers,real Numbers,composite numbers,square numbers,positive numbers,2-digit numbers.
Numbers that are not prime numbers are called composite numbers.
The different names for Numbers are defined as Natural numbers, whole numbers , real numbers, decimal numbers, integers, rational numbers and irrational numbers.
Yes, all natural numbers are real numbers. Natural numbers are a subset of real numbers, so not all real numbers are natural numbers.