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