Casio Geometry User Manual page 55

u To display the result of a calculation that uses on-screen measurement
values
Example: With line segment AB and line segment CD (point C being on AB) drawn on the
display as shown here, calculate the sum of ∠ ACD and ∠ DCB, and display the
result on the screen. (54.72 + 125.28 = 180.00)
• For information about displaying measurement values of ∠ ACD and ∠ DCB, see
"Pasting Measurements into a Screen Image" (page 5-11).
1. Perform the following operation: K(Option) – 2:Expression.
• This will display "EXPR=" at the pointer location and display the measurement box.
• The above will also display labels for each measurement currently on the screen.
2. Now you can use the labels to specify measurement values in the calculation you input in
the measurement box.
• To input a measurement value in the measurement box, input the at sign (@) followed
by the numeric label of the value: @1, @2, etc. Since we want to calculate the sum of
angles DCB (@1) and ACD (@2) here, you would input the following: @1+@2.
• You can input "@" by pressing 1.
3. After inputting the calculation expression, press w.
• The calculation result is displayed to the right of "EXPR=".
5-14
Using the Measurement Box
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