Mathematics for IGCSE & O level - Coordinate Geometry (Section 2 - No. 37)
A line segment has endpoints A(2, 4) and B(6, 8). Which statements are correct?
The midpoint of AB is (4,6)
The length of AB is 4
The gradient of AB is 1
The equation of AB is y=x+2
Explanation
Midpoint is ((2+6)/2, (4+8)/2) = (4,6). Gradient is (8-4)/(6-2) = 1. Equation: y-4=1(x-2), y=x+2
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