Casio fx-3650P

28
19 Center of mass of a triangle
(barycentre)
The three medians of a triangle all meet at a single
point. This point is called the “center of mass” (or
barycentre).
The center of mass divides each line in half.
For a triangle with corner points , and ,
the center of mass is given:
Program
？→ Ｘ：？→ Ｙ：Ｘ → Ａ：Ｙ → Ｂ：？→ Ｘ：？→ Ｙ：Ｘ → Ｃ：Ｙ → Ｄ：？→ Ｘ：？→ Ｙ：
（Ａ ＋ Ｃ ＋ Ｘ）÷３→ Ｘ：（Ｂ ＋ Ｄ ＋ Ｙ）÷３→ Ｙ：Ｘ Ｙ ＜ 67 STEP ＞
INPUT X, Y (first time):
A ( X, Y ) X, Y(second time) : B ( X, Y ) X, Y(third time) : C( X, Y )
OUTPUT X, Y: center of mass
P(X, Y)
Execution Example:
The center of mass for a triangle with corners A(1,0),B(0,3) and C(－1,0) is P(0,1).
A
B
C
P
O
AB C
OP
OA OB OC++
3
---------------------------------------=
ON
MODE MODE MODE
1
PRGM
MODE
1
COMP
1
P1
Prog
1
S A
D R P1
P1
P2 P3 P4 G
1
EXE
0
EXE
S A
D R P1
P1
P2 P3 P4 G
0
EXE
3
EXE
1
EXE
0
EXE
Disp
S A
D R P1
P1
P2 P3 P4 G
EXE
S A
D R P1
P1
P2 P3 P4 G
関数電卓事例集 .book 28 ページ ２００２年９月２日 月曜日 午後６時５１分