Rotation

In math a rotation, unless specified, goes counterclockwise (to the left).

Here's the notation for rotation.

    • r means rotation.
        • This is not to be confused with R, which is reflection.
    • x° is the how much we'll rotate the preimage in degrees.
    • Q is the point where we rotate about.

So this means, "The rotation of UVW going x° around Q is U'V'W'."