Coordinate Geometry

**Cartesian plane and the terms associated with it**

To identify the position of an object or a point in a plane, we require two perpendicular lines: one of them is horizontal and the other is vertical.

**Example:**

Put an eraser on a book and then describe the position of the eraser.

**Solution:**

In order to identify the position of the eraser on the book, we take the adjacent edges as perpendicular lines. Take 1 unit = 1 cm along the vertical and horizontal lines.

Now, it is seen that the eraser is at a distance of 11 cm from the vertical line and 10 cm from the horizontal line.

Thus, conven…

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