Answer:
(a) none
Explanation:
You want to know how many triangles can be formed from segments of lengths 1.6 m, 2.9 m, and 4.7 m.
Triangle inequality
The triangle inequality requires the sum of the two shorter segments exceed the length of the longest one.
1.6 + 2.9 > 4.7
4.5 > 4.7 . . . . . . . not true — no triangle can be formed
These segments will form no triangles.
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