3D coordinates

3D coordinates will not be assessed in the question papers in session 2021–22

We saw previously how to represent 2D vectors on the \(xy\) plane.

Now, we will extend this to look at 3D vectors using the \(xyz\) plane.

Diagram of 3D shape

3D coordinates are used, for example, by air traffic controllers to find the location of a plane by its height as well as its grid reference.

The vector OP has initial point at the origin O (0, 0, 0) and terminal point at P (2, 3, 5). We can draw the vector OP as follows:

Diagram of 3D shape with value P (2, 3, 5)

Remember that 3D coordinates take the form \((x,y,z)\)