Label the axes. First, label the σ axis.
If τ on a face rotates the element CW, the point plots above the σ axis.
If τ rotates the element CCW, the point is plotted below the σ axis.
Label the axes. First, label the σ axis.
If τ on a face rotates the element CW, the point plots above the σ axis.
If τ rotates the element CCW, the point is plotted below the σ axis.