Given that is an obtuse-angled triangle at , where cm and cm, which of the below can be the length of .
Since this triangle is obtuse-angled at , then the longest side is .
For every obtuse triangle, the square length of the triangle's longest side is greater than the sum of the square lengths of the other two sides.
Write an inequality to show that the square length of is greater than the sum of the square lengths of the other two sides.
Solve for the value of . (Approximate to the nearest hundredth.)
Of the possible lengths provided, cm is the only length that cm is greater than. Therefore, cm.