Mathematics for IGCSE & O level - Coordinate Geometry (Section 4 - No. 41)
What is the length of the line segment joining the points (1, 2) and (4, 6)?
5
sqrt(25)
3
5
解释
Using the distance formula: sqrt((4-1)^2 + (6-2)^2) = sqrt(3^2 + 4^2) = sqrt(9 + 16) = sqrt(25) = 5