Locate the points A (1, 2), B (4, 2) and C (1, 4) on a graph sheet taking suitable axes. Write the coordinates of the fourth point D to complete the rectangle ABCD.
The points in the graph are
A = (1, 2)
B = (4, 2)
C = (1, 4)
The incomplete rectangle on the graph will look like
The completed rectangle ABCD on the graph is
∴ The coordinates of point D, to complete the rectangle ABCD are D (4, 4).
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