by mistake.


[See pp. 70, 1]




7. Both Diagrams to be employed.

__________


-----------
| | | -----------
| --x-- | | | |
| | | | | | x |
|--y--m--y'-| |--y--|--y'-|
| | | | | | x' |
| --x'- | | | |
| | | -----------
-----------

__________


N.B. In each Question, a small Diagram should be drawn, for x and
y only, and marked in accordance with the given large Diagram: and
then as many Propositions as possible, for x and y, should be read
off from this small Diagram.