Or like the diheadral angle of airplane wings, anhedral ("negative dihedral") isn't as common. https://en.wikipedia.org/wiki/Dihedral_(aeronautics) https://en.

Or like the diheadral angle of airplane wings, anhedral ("negative dihedral") isn't as common. https://en.wikipedia.org/wiki/Dihedral_(aeronautics) https://en.wikipedia.org/wiki/Dihedral_(aeronautics)