The number 45,28, and 53 form a Pythagorean triple
To be a Pythagorean triple, the numbers must satisfy the Pythagorean theorem:
[tex]a^2+b^2=c^2[/tex]
so check:
[tex]45^2+28^2=53^2\\\\2025+784=2809\\[/tex]
and that holds, so the statement is TRUE