Question : Which of the set of three sides can't form a triangle?
Option 1: 5 cm, 6 cm, and 7 cm
Option 2: 5 cm, 8 cm, and 15 cm
Option 3: 8 cm, 15 cm, and 18 cm
Option 4: 6 cm, 7 cm, and 11 cm
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Correct Answer: 5 cm, 8 cm, and 15 cm
Solution :
In a triangle, the sum of two sides is always greater than the third side.
Here, sides 5 cm, 8 cm, and 15 cm can't make a triangle.
Because $5 + 8 < 15$
Hence, the correct answer is '5 cm, 8 cm, and 15 cm'.
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