# Articulated cube with fixed bar (I)

This activity belongs to the

*GeoGebra book*Linkages. In the previous construction, the degrees of freedom of the cube do not coincide with the internal degrees of freedom. For them to coincide, we have to fix the cube in space. In this construction, and the next one, we have fixed the points O and U. Also, the point E describes its path in the XY plane.- O = (0, 0, 0)
- U = (0, 1, 0)
- E = (E
_{x}, E_{y}, 0)

- Black: fixed points.
- Grey: points with 0 degrees of freedom.
- Blue: points with 1 degree of freedom.
- Green: points with 2 degrees of freedom.
- Red: points with 3 degrees of freedom.

Author of the construction of GeoGebra: Rafael Losada

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