The complete graph shown has 6 points, each joined to every other point. How many line segments does it have in total?
- A.12
- B.14
- C.15 ✓
- D.18
Explanation: With 6 points: 6×5÷2 = 15 segments.
Class 6 IMO Mathematics Olympiad practice · Algebraic Thinking · Patterns in Mathematics
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