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
A B
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
Summary of Contents for 3950P
Page 1: ......
Page 46: ...MEMO MEMO MEMO MEMO...
Page 47: ...Authors Dr Yuichi Takeda Research and Development Initiative Chuo University...
Page 48: ......
