A triangle is NOT said to be a right-angled triangle if its sides measure:
Answer & explanation
Correct answer: option 2
By carefully observing all the options. We find that,
Except option 2 all others are triplet and follow pythagoras theorem.
Option2 :- 5 cm, 7 cm and 9 cm
P² + B² = H²
5² + 7² ≠ 9²
So, Triangle with sides 5 cm, 7 cm and 9 cm is not right angle triangle.