Finding The Area Of A Triangle - Casio fx-3650P Programming Manual

14

Finding the area of a triangle

In general, when the length of the base and the height of a triangle are known, its area can be
calculated by （Length of base）×（Height）÷２ . However, it is also possible to determine
the area given the lengths of the three sides, using the following formula.
Let the lengths of the three sides be
(
D = A
and set
calculated:
(
S = D D A –
ON MODE MODE
？→ Ａ：？→ Ｂ：？→ Ｃ： （Ａ ＋ Ｂ ＋ Ｃ）÷２→ Ｄ：√（Ｄ（Ｄ － Ａ） （Ｄ － Ｂ） （Ｄ － Ｃ） ）
→ Ｍ：Ｍ ＜ 47 STEP ＞
OUTPUT Ｍ : the area of a triangle
Find the area of the right-angled triangle with sides of length ３ , ４ and ５ .
(The answer may also be calculated as: ３×４÷２＝６ )
Prog 1
EXE
3
4 EXE
EXE
5
) 2 ÷
+ B C +
. The area
) D B ( ) D C ( )
– –
MODE
A B C
， and ,
is
Ｓ
PRGM
COMP
1 MODE
S A
S A
S A
S A M
A
S
C
1 1
P1 P1 P2 P3 P4 D R
P1 P1 P2 P3 P4 D R
P1 P1 P2 P3 P4 D R
P1 P1 P2 P3 P4 D R
B
G
G
G
G
23