Mark the points A (2, 4), B (−3, 4), C (−3, −1) and D (2, −1) in the cartesian plane. State the figure obtained by joining A and B, B and C, C and D and D and A.

The ordinates of two points are each −6. How is the line joining them related with reference to x–axis?

The abscissa of two points is 0. How is the line joining situated?

With rectangular axes plot the points O (0, 0), A (5, 0), B (5, 4). Find the coordinate of point C such that OABC forms a rectangle.

In a rectangle ABCD, the coordinates of A, B and D are (0, 0) (4, 0) (0, 3). What are the coordinates of C?