Question 1035283
It is a right angled triangle.

You need to check whether Pythagoras theorem can be applied or not.
If suppose it is a right angled triangle,
Then hypotenuse will be the longest side.
Here it is 13 ft.

So check whether 5^2 + 12^2 = 13^2 .
Since it is true, hence triangle is a right angled triangle.