Drag the endpoints of the solid arrows x and y
to change the yellow bivector
spanned by them, and its pink inverse. Try to find a configuration in
which the two are obviously equal-sized, but of opposite orientation.
The circle is the unit circle of the Euclidean metric. For
graphical convenience, the inverses have been denoted by primes.
Created with Cinderella by Leo Dorst 20010719.