Which of the following sets of lengths (in cm) will give three sides of an obtuse-angled triangle?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 15, 62, 64.
If the square of any one side of the triangle is greater than the sum of the squares of the other two sides of the triangle.
From the given options,
For option 1,
642 = 4096 and (152 + 622) = 4069
⇒ 642 > (152 + 622)
Hence the correct answer is 15, 62, 64.