Can form triangle : 11.5,10.5, 6.1 & 8, 6.7, 9.8 & 5, 6, 8 & 9.5, 7.5, 8.5
Can not form triangle : 9.5, 3.5, 4.5 & 8, 6.7, 1
What is triangle inequality theorem ?
If sum of any two line segments is greater than the third line segment, then we can say that, they can make a triangle.
How to know which sets form triangle ?
1st problem,
The given line segments are 11.5, 10.5, 6.1
Now, 11.5+10.5 = 22 > 6.1
10.5+6.1 = 16.6 > 11.5
11.5+6.1 = 17.6 > 10.5
So, this three segments can form triangle.
2nd problem,
The given line segments are 9.5, 3.5, 4.5
Now, 9.5+3.5 = 13 > 4.5
9.5+4.5 = 14 > 3.5
4.5+3.5 = 8 < 9.5
Here triangle inequality rule isn't applicable.
So, it can not form triangle.
3rd problem,
The given line segments are 8, 6.7, 1
Now, 8+6.7 = 14.7 > 1
8+1 = 9 > 6.7
6.7+1 =7.7 < 8
Here triangle inequality rule isn't applicable.
So, it can not form triangle.
4th problem,
The given line segments are 8, 6.7, 9.8
Now, 8+6.7 = 14.7 > 9.8
8+9.8 = 17.8 > 6.7
6.7+9.8 = 16.5 > 8
So, this three segments can form triangle.
5th problem,
The given line segments are 5, 6, 8
Now, 5+6 = 11>8
5+8 = 13 > 6
6+8 = 14 > 5
So, this three segments can form triangle.
6th problem,
The given line segments are 9.5, 7.5, 8.5
Now, 9.5+7.5 = 17 > 8.5
9.5+8.5 = 18 > 7.5
7.5+8.5 = 16 > 9.5
So, this three segments can form triangle.
Learn more about triangle here :
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