Casio fx-3650P

23
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 ， and ,
and set . The area
Ｓ is
calculated:
Program
？→ 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
Execution Example:
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 )
B
C
A
S
A
BC
DABC++()2÷=
SDDA–()DB–()DC–()=
ON
MODE MODE MODE
1
PRGM
MODE
1
COMP
1
P1
Prog
1
S A
D R P1
P1
P2 P3 P4 G
3
EXE
S A
D R P1
P1
P2 P3 P4 G
4
EXE
S A
D R P1
P1
P2 P3 P4 G
5
EXE
M
S A
D R P1
P1
P2 P3 P4 G
関数電卓事例集 .book 23 ページ ２００２年９月４日 水曜日 午後１２時５５分