“9”，（x，y，），，，XY、X、Y，。
Click "Mark Nine Point Rectangle" to mark the following graph (x, y are
used to illustrate the direction of the graph, but not the actual marking). Note
that the direction and position of the short line segment and the triangle in the
upper left corner must be consistent with the figure below. If it is not
consistent, then adjust the XY interchange, X reverse and Y reverse
parameters of the main interface until the marked graphs are in the same
direction as the figure above.
，。9，（5），：
When measuring the coordinates of points, the measurement error
should be reduced as much as possible. Measure the coordinate values of 9
points in the above figure in turn, based on the center point (point 5), and the
sequence number is as shown in the following figure:
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