The a-measure is determined as follows:

Click on the points 1, 2 and 3. An isosceles triangle appears, with a help

line at point 1.

The value resulting is the height from the base. When making fine adjustments

(measure function off) to the corners or to the help line, the isosceles nature

of the triangle is preserved.

    

         

The z-measure is determined as follows:

After clicking on points 1, 2 and 3 a triangle appears. After entering into the

table, two measured values are displayed.

Value 1 is the length of side a and value 2 the length of side b. A fine adjustment

(measure function off) can be made at click points 1, 2 and 3.