Answer:
It is not a triangle
Step-by-step explanation:
The Triangle Inequality theorem states that in a triangle, [tex]a+b>c[/tex], where [tex]a[/tex] and [tex]b[/tex] are shorter side lengths and [tex]c[/tex] is the longest side length.
Given that [tex]5+9<15[/tex], the given side lengths do not compose a valid triangle.
