Question 55

A triangle is NOT said to be a right-angled triangle if its sides measure:

Solution

6 cm, 8 cm and 10 cm is a pythagoras triplet

5 cm, 12 cm and 13 cm is a pythagoras triplet

3 cm, 4 cm and 5 cm is a pythagoras triplet

Hence, above measurements are sides of a right angled triangle

5 cm, 7 cm and 9 cm is not a pythagoras triplet

$$\therefore\ $$5 cm, 7 cm and 9 cm are not sides of right angled triangle

Hence, the correct answer is Option A

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