Sharp EL-5250, EL-5230 operation manual Side Lengths, Heron Normal, Example, Result

Chapter 8: Application Examples

Program code	Key operation
S=‰(T(T-A)(T-B)(T-C))	; S ; = @ * (
	; T ( ; T - ; A
	) ( ; T - ; B )
	( ; T - ; C ) )
	e
Print S	i 0 ; S e
End	i 5 e
Label ERROR	i 6 @ a ERROR ;
	e
Print”NO TRIANGLE	i 1 @ a NO s
	TRIANGLE ; e
Wait 1	i 3 1 e
Print”REENTER	i 1 @ a REENTER ;
	e
Goto START	i 9 @ a START ;
	e

Example

Obtain the area of the triangle with the side lengths of 20 cm (A), 35 cm (B) and 40 cm (C).

4.Press j to return to the PROG mode menu.

5. Press 0, select the program ‘HERON’
	HERON :NORMAL
and press e.
• If the values you enter do not satisfy the	SIDE LENGTHS
	A=?
conditions to make a triangle (e.g. A + B >

C where A, B, C are the side lengths), the program prompts you to re- enter the values from the beginning. If you wish to stop the program, press j.

6.Enter 20 for A, 35 for B and 40 for C.

Result

The area of the triangle is approximately 350 cm2.

40

S= 349.944192

90