Which of the following sets of three lengths can form a triangle?

Answer: C. 4cm, 5cm, 8cm

To determine which set of lengths can form a triangle, we use the Triangle Inequality Theorem. This theorem states that the sum of the lengths of any two sides of a triangle must be strictly greater than the length of the third side (a + b > c). In the option 4cm, 5cm, 8cm satisfies (a+b > c).

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