Sharp PC-1403 - Page 233

227
where
L : B ase l ength { the lo ng est of s id e s a , b, an d c )
h : Height (Figur es are trunca t ed t o thr ee dec i m a l p l a c e s. )
Area o f triangle
S
_a + b + c
- 2
S = J s(s-a ) (s - b )Cs - c )
( 2)
( 1 )
•REMARKS
• HOW TO OP E RATE
1 . Pre ss ~ W . (Progr a m starts)
Input the num be r of vert exe s (l . e . , po i n ts ) an d th e c oo rd i na t es x and y of eac h
verte x acco r d i n g t o t he di spl a y .
2 . Next , press [QEJ 00 .
I nput the verte x numb e r ( i.e., p o i nt n um b e r) o f eac h of the t hree v ertexes of t he
t ria n g l e accord i ng to t h e d i s p la y , and th e a r e a o f the t ria n gle w ill be printed out.
When you press I EHTER J b efo r e ent e r i n g t h e ve rt e x num be r, t h e su m total of the
areas of all the tr i a ng l es i s out p ut o n t h e pr i nte r.
3 . I f you press ~ ~ ! , th e sum tota l o f al l t he t r ia ng l e a r eas wi ll be cleared and
t h en the program ends .
Note: Th e number of vertexes ma y be s t o r ed up to th e fo ll o wi ng li m i t s:
255 ve rte xes
Any polygon i s t heor et i c a ll y a n agg re gatio n of t r i ang l e s. By u til iz i ng this theory , let us
calcula t e the a r e a o f a p oly go n . T his p r o gr a m f i gur e s out t h e are a of a polygon by
dividing the p o lygon in t o t r ia ng les, calcul a t i ng th e a re a o f e ach t riang l e, a nd obtaining
the s um t otal o f the a r eas o f all th e tri ang l e s .
Required Peripheral
Eq u ipment
C E-1 2 6P
PROGRAM TI T LE: Cal c u l ation o f Are a of N - s id e d Polygon