1. The areas marked A and B in the diagram indicate areas of the surface on each face of the pyramid as follows:
A — Surface coloured red which may be reflectorised.
B — Surface coloured white which shall be reflectorised.
1. The areas marked A and B in the diagram indicate areas of the surface on each face of the pyramid as follows:
A — Surface coloured red which may be reflectorised.
B — Surface coloured white which shall be reflectorised.