Geometryhard · Past Paper
If (1, 2), (4, y), (x, 6), and (3, 5) are vertices of a parallelogram taken in order, then x and y are:
Ax=6, y=3
Bx=3, y=6
Cx=2, y=3
Dx=1, y=5
✓ Correct Answer: A — x=6, y=3
Midpoints of diagonals coincide. Diagonals are (1,2)-(x,6) and (4,y)-(3,5). (1+x)/2 = (4+3)/2 => x=6. (2+6)/2 = (y+5)/2 => y=3.
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