Lesson: Geometry Challenging - 20

Coordinate Geometry: The Coordinate Plane

[Page 20 of 32]

In coordinate geometry, points are placed on the "coordinate plane" as shown below. It has two scales - one running across the plane called the "x axis" and another a right angles to it called the y axis. (These can be thought of as similar to the column and row in the paragraph above.) The point where the axes cross is called the origin and is where both x and y are zero.

Coordinate geometry is based on a 2-dimensional plane surface. The planes are defined by an x-axis (horizontal) and a y-axis (vertical).

The plane looks like this:

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