Casio fx-5800P User Manual page 99

A Searching for a Built-in Formula by Scrolling through the Menu
1. Press .
2. Use and
recall is selected.
A Performing Calculation with a Built-in Formula
The following example shows how to use Heron's formula to determine the area of a triangle
when the lengths of its three sides (8, 5, 5) are known.
Operation Procedure
Search for Heron's formula:
Start the calculation:
(This displays a prompt for input of the first variable value.)
Input a = 8, b = 5, and c = 5:
• As shown above, the calculation result appears after you assign values to all of the
required variables.
• In the case of a formula that produces multiple results (such as / Y Conversion), the
symbol will turn on when the fi rst calculation result is on the display. Press
display the other result(s) produced by the formula. The
fi nal result is on the display.
• Pressing while the fi nal calculation result is on the display (
will re-execute the formula from the beginning.
A Displaying a Built-in Formula
While a prompt for input of a value for a formula variable is on the display, you can display
the entire formula by pressing
to scroll through the built-in formula names until the one you want to
) (H)
(This displays the calculation result.)
6 (LOOK).
(HeronFormula)
8 5 5
E-98
symbol will turn off when the
symbol turned off)
to