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Mathematics for IGCSE & O level - Coordinate Geometry (Section 3 - No. 26)

What is the distance between the points (1, 1) and (4, 5)?
5
sqrt(7)
7
25

Explanation

sqrt((4-1)^2 + (5-1)^2) = sqrt(3^2 + 4^2) = 5.

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