The triangle whose lengths of sides are 4 cm, 5 cm and 6 cm is a right-angled triangle.
False
For any length to be sides of a right-angled triangle, the sum of the squares of the 2 sides should be equal to the square of the third side.
Here,
42+52=16+25=41≠=62
Since the squares of 4 and 5 don't add up to the square of 6, these do not form a Pythagorean triplet
Hence, they cannot be used to represent the three sides of a right-angled triangle.