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The minimum number of independent measurements (data) needed to construct a unique triangle is:

Class 9Constructions of TrianglesGeometry
  • A3
  • B6
  • C4
  • D2

Step-by-Step Solution

A triangle has 6 parts (3 sides, 3 angles). Any valid set of 3 suitable parts (such as SSS, SAS, ASA) determines it uniquely, so 3 measurements are needed.
Answer: A) 3

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