determine the fourth and fifth term of triangular number what is square number is there if we add them
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4th triangular number is 4×5=20÷2=10
5th triangular number is 5×6=30÷2=15
10+15=25
that is 5^2
pls mark it as brainliest answer
5th triangular number is 5×6=30÷2=15
10+15=25
that is 5^2
pls mark it as brainliest answer
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