No, It’s not a right triangle.
We can prove by using Pythagoras theorem
Let the longest length be hypotenuse and shortest length be base now,
h^2=p^2+b^2
16^2=13^2+8^2
256=169+64
246=233
Hence it is not equal with hypotenuse
In right triangle the sum of the squares of two short sides should be equal to hypotenuse
