Geometryeasy · Past Paper
Find the coordinates of the midpoint of the line segment joining (a+b, a-b) and (a-b, a+b).
A(a, a)
B(b, b)
C(a, b)
D(b, a)
✓ Correct Answer: A — (a, a)
x = (a+b + a-b)/2 = 2a/2 = a; y = (a-b + a+b)/2 = 2a/2 = a.
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