Sharp EL-9400 Herons Formula, Calculation, EL-9600/9400 Graphing Calculator, D = A + B + C, Step

EL-9600/9400 Graphing Calculator

Heron's Formula

Use Heron's formula to find the area of a triangle when the sides (A,B,C) of the triangle are known.

Calculation
S = D (D - A) (D - B) (D - C)	A	C
D = (A + B + C)
2		B
FLOWCHART	PROGRAMME LIST(REAL MODE)

Start

Entry of sides

Calculation of D

Calculation of area

Display of area

Enter sides A, B and C.

Value of D calculated.

Area S calculated.

Area of triangle displayed.

Title : HERON

Print "Input LENGTH

Input A

Input B

Input C

(A+B+C)/2 D

(D (D-A) (D-B) (D-C) ) S

Print "S =

Print S

End

End

PARAMETERS

Name of parameter	Content	Name of parameter	Content
A	value of side A	D	value of D
B	value of side B	S	area
C	value of side C

Exercise

Find the area of a triangle when sides A, B and C are 20, 35 and 40cm respectively.

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2

StepSpecify the programme mode.

Select the title HERON.

Enter the values A, B and C.(Display of area)

Key Operation	Display
	(When using EL-9600)

2nd F PRGM A *2 0 ENTER 3 5

ENTER 4 0 ENTER

The area is approximately

3 350cm2.

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