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2. Press
， and then direction keys to alter the size of the examined area. Press
and
to decrease or increase the area vertically, and then press
or
to decrease or increase the area horizontally；
3. Press
again，then use
or
to adjust the angle. Press
to revolve
anticlockwise the examined area and press
to revolve clockwise；
4. Press
again ， the function of direction keys will be shifted into Move the
Examined Area；
5. After the location, size, angle of the examined area are confirmed, the measuring can be
done .
If measuring should be continued, press
and
or directly press
，and
repeat Step 1-5. You can get 2 groups of data at most. The results are on the right side of the
screen.
Picture. Illustration of Measuring perimeter and Area（Ellipse Method）
C1 and A1 are respectively perimeter and area of the first group；
C2 and A2 are respectively perimeter and area of the second group；
C1/C2 is the ratio of two perimeters；
A1/A2 is the ratio of two areas.
Mouse Operation
