The figure shows a complete graph — every pair of points joined by a line. How many line segments are there?
- A.2
- B.3 ✓
- C.4
- D.6
Explanation: With 3 points, every pair gets one segment: 3×2÷2 = 3.
Class 6 IMO Mathematics Olympiad practice · Algebraic Thinking · Patterns in Mathematics
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