Plot the point A(2,0), B(2,2), C(0,2) and draw the line segments OA, AB, BC, CO. What figure do you obtain? Find its area.

The figure below shows the points A(2, 0); B(2, 2); C(0, 2) plotted on the graph;

Now here we can see that OA = AB = BC = CO = 2 units
And the line bounded by OA; AB; BC and CO forms a quadrilateral in which each angle is a right angle and each side are equal.
Therefore the OABC is a square.
Then area of square OABC = 22 square units = 4 square units.

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