Answer:
Option J 13
Explanation:
we know that
If applying the Pythagoras Theorem
----> is an obtuse triangle
----> is an acute triangle
----> is a right triangle
where
c is the greater side
Verify each case
case F) we have

substitute

-----> is not true
Is a right triangle
case G) we have

substitute

-----> is not true
Is an acute triangle
case H) we have

substitute

-----> is not true
Is an acute triangle
case J) we have

substitute

-----> is true
Is an obtuse triangle