There are an many triangular numbers that are also square numbers. Simply put, the sum of two consecutive triangular number equals a square number. Examples include 1 and 36.
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A square based pyramid has 4 triangular faces and 1 square face.
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they can be called many things like cardinal numbers(0,1,2,3,4,5,6) counting numbers(1,2,3,4) square(1,4,6,9,16) Triangular(1,3,6,10,15) Fibonacci(1,1,2,3,5,8,) Palandromic numbers(121) PS- these are types of numbers because I don't get really what your asking for SORRY
A square pyramid has four triangular faces and one square face. In total, that is five faces.
There are 10 square numbers