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Mathematics for IGCSE & O level - Coordinate Geometry (Section 3 - No. 14)

What is the length of the line segment with endpoints (1, 1) and (4, 5)?
3
4
5
6

解释

Length = √((4-1)^2 + (5-1)^2) = √(9 + 16) = √25 = 5

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