How to use lookvector properly?

I know lookvector can return the front face of the part, but how can I get the right/left/top/bottom side?

I cannot find any proper information about this.

For Right Side:

CFrame.RightVector

For Left Side:

-CFrame.RightVector

For UP Side:

CFrame.UpVector

For Bottom Side:

-CFrame.UpVector

See the “-” On Left Side and Bottom Side? Its to get the inverse of those.

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