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Retrieved from Digital Repository at Srinakharinwirot University http://kids-d.swu.ac.th
5
1. 2.
A
B
B A
5.1
5.1.1) A B
A z
z B A B AB AB
Retrieved from Digital Repository at Srinakharinwirot University http://kids-d.swu.ac.th
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1
1. 1
1 .........................
2. 2
......................................................................................................................................
3. 2
..........................................................................................................................................................
Retrieved from Digital Repository at Srinakharinwirot University http://kids-d.swu.ac.th
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1.
1) 2) 3) 4)
5) 6) 7) 8)
9) 10) 11) 12)
13) 14) 15)
16) 17) 18) 19) 20)
2
1) ......................................................................... 2) ........................................................................................... 3) ............................................................................................ 4) .....................................................................................
Retrieved from Digital Repository at Srinakharinwirot University http://kids-d.swu.ac.th
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5.1.2)
A B AB AB BA BA CD CD EF EF
GH GH
AB ) AB measure of AB 5 m = 5 . AB = 5 .
(ABm ( )ABmAB AB
( )AB AB + CD + CD
AB ( )ABmAB CD ( ) ( )CDm+ABm
AB
H
G
F
E
D C
B
A
1)
2) 2
Retrieved from Digital Repository at Srinakharinwirot University http://kids-d.swu.ac.th
1
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3
Retrieved from Digital Repository at Srinakharinwirot University http://kids-d.swu.ac.th
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5.1.3)
B B
A A A B AB BA
B B BA AB
1) B AB AAB
5.1.4)
A
R () C ABC B BC B
BA ABC A
() DEF ED E
FED DEF EF
RQP PQR () PQR QP QR B
() () B P Q
Retrieved from Digital Repository at Srinakharinwirot University http://kids-d.swu.ac.th
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ABC DEF
C
A
B D F
E ABC
ABC 30 m = 30 ( )CBAm ( )ABCm
( )CBA AB CD E
m = m ( )DEA ( )BECA = m ( )( )CEAm BED DEA BEC
C D CE BEAB
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1. 2. 3. 4. 5.
5.2
, , ,
5.2.1) 1 AB XY AB
A
Y
1) XZ AB
2) X AB Y
XZ XYAB
AB XY
XY AB XY
Retrieved from Digital Repository at Srinakharinwirot University http://kids-d.swu.ac.th
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1. AB
A B
CD CD A B
1.1............................................................................................................................................................................................................................................................................................................... 1.2............................................................................................................................................................................................................................................................................................................... 2. a , b c 3
a b c
ABC a , b c
1).................................................................................................. 2) ................................................................................................. 3) ................................................................................................. 4) ................................................................................................. 5)................................................................................................... 6) ..................................................................................................
Retrieved from Digital Repository at Srinakharinwirot University http://kids-d.swu.ac.th
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3. a , b , c d 4 d
ABCD a , b , c d 1) ................................................................................................................................... .......................................................................................................................................................... .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. .......................................................................................................................................................... .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... ..........................................................................................................................................................
Retrieved from Digital Repository at Srinakharinwirot University http://kids-d.swu.ac.th
1
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5.2.2)
2 AB
B
1) A B AB M N
2) MN AB O O 2 AO = OB AB
O AO = OB AB
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5) ..............................................................................................
G H
GH 8 2)
M N 1) .............................................................................................. 2) .............................................................................................. 3) .............................................................................................. 4) .............................................................................................. 5) ..............................................................................................
MN 4 1)
Retrieved from Digital Repository at Srinakharinwirot University http://kids-d.swu.ac.th
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5.3
3 C m ( ) ( )ZYX B m=CB ZYA A X ZYX
1) BC
2) Y YX YZ M N
3) B YM BC O 4) O MN P 5) BA P m ( ) ( )ZYXm=CBA
O
P
C
X
M
B N Z Y
Retrieved from Digital Repository at Srinakharinwirot University http://kids-d.swu.ac.th
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1. 2.
5.4
4 T 2 AC C TA 1) A M
N AC AT
2) M N O AO
T 2 AO AC ( ) ( )TAOm=OACm
Retrieved from Digital Repository at Srinakharinwirot University http://kids-d.swu.ac.th
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6
CBA ZYX
X
Y Z
1) ......................................................................................................
2) ...................................................................................................... 3) ...................................................................................................... 4) ...................................................................................................... 5) ......................................................................................................
2) CBA ZYX
X
Y Z
1) .....................................................................................................
2) ..................................................................................................... 3) ..................................................................................................... 4) ..................................................................................................... 5) .....................................................................................................
Retrieved from Digital Repository at Srinakharinwirot University http://kids-d.swu.ac.th
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3) MNO 4 M
N O
1) ......................................................................................................
2) ...................................................................................................... 3) ...................................................................................................... 4) ...................................................................................................... 5) ...................................................................................................... 6) ......................................................................................................
4) ABC 8 A
C
B 1) .....................................................................................................
2) ..................................................................................................... 3) ..................................................................................................... 4) ..................................................................................................... 5) ..................................................................................................... 6) ..................................................................................................... 7) ..................................................................................................... 8) .....................................................................................................
Retrieved from Digital Repository at Srinakharinwirot University http://kids-d.swu.ac.th
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5.5 60 5 J 60=NA
Y X
Z XZ XY
APAQ PQ
P
N
J
1) AJ
2) A AJ P 3) P AP Q 4) AN Q m ( )AJ 60=N
60
Retrieved from Digital Repository at Srinakharinwirot University http://kids-d.swu.ac.th
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7
1) 30 1) ..........................................................................................................
2) .......................................................................................................... 3) .......................................................................................................... 4) .......................................................................................................... 5) .......................................................................................................... 6) ..........................................................................................................
2) 120 1) .........................................................................................................
2) ......................................................................................................... 3) ......................................................................................................... 4) ......................................................................................................... 5) ......................................................................................................... 6) .........................................................................................................
Retrieved from Digital Repository at Srinakharinwirot University http://kids-d.swu.ac.th
1
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5.6 90 6 P PQR 90=RQ 1) PX Q PX
2) Q PX M N 3) M N R 4) QR P PQR 90=RQ
P Q M N X
180 2 PQX
Retrieved from Digital Repository at Srinakharinwirot University http://kids-d.swu.ac.th
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8
5.7
1) .........................................................................................................
2) ......................................................................................................... 3) ......................................................................................................... 4) ......................................................................................................... 5) ......................................................................................................... 6) .........................................................................................................
3) .......................................................................................................... 4) .......................................................................................................... 5) ..........................................................................................................
2) 270
1) ..........................................................................................................
45
1)
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5.7.1) 7 O AB AB O AB AB 1 2
X M M B B A A P
O
1) O O AB
X Y ( 2 P X Y )
AB AB
2) X Y Q 3) OQ AB AP M OM O AB
5.7.2) 90
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1
1) ......................................................................................................... 2) ......................................................................................................... 3) .
1) ......................................................................................................... 2) ........................................................................................................ 3) ........................................................................................................ 4) ........................................................................................................
ABC
a b
a
Retrieved from Digital Repository at Srinakharinwirot University http://kids-d.swu.ac.th
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d c
3) a , b c a , b c
1) .........................................................................................................
2) ........................................................................................................ 3) ........................................................................................................ 4) ........................................................................................................ 5) ........................................................................................................
4) a , b , c d
a , b , c d
a b
a
c
b 1) .........................................................................................................
2) ......................................................................................................... 3) . 4) . 5) . 6) .
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2
1)
1) .........................................................................................................
2) ......................................... ............................................................... 3) ........................................................................................................ 4) ........................................................................................................ 5) ........................................................................................................
................................
2) a b ABC AB a
b=ABC=BAC
1) ........................................................................................................
2) ........................................................................................................ 3) ........................................................................................................ 4) ........................................................................................................ 5) 6)
...................................................
A B
b
C
D
a
CBA CBD
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2 ()
a 3) ABCD a b c
ACAB CB
1) ..........................................................................................................
2) ......................................................................................................... 3) ......................................................................................................... 4) ......................................................................................................... 5) .........................................................................................................
4) a
ABC AB a ONM=BC , ZX=AA YBC
1) .........................................................................................................
2) ......................................................................................................... 3) ......................................................................................................... 4) ......................................................................................................... 5) ......................................................................................................... 6) .........................................................................................................
b
c
M
N O X
Y Z
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5) C BA 1) ..........................................................................................................
2) ......................................................................................................... 3) ......................................................................................................... 4) ......................................................................................................... 5) .........................................................................................................
6) C BA
1) .......................................................................................................
2) ........................................................................................................ 3) ........................................................................................................ 4) ........................................................................................................ 5) ........................................................................................................ 6) ........................................................................................................ 7) ........................................................................................................ 8) ........................................................................................................
A
B
A
C
B C
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3
1) TOP 60 2) AOM 120 3) 30 4) 45 BEN KIT 5) LEK 15 6) HAM 22.5 7) AU 150 8) YOT 240 M 9) SAN 270 10) NED 300
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11) WA 135 12) TI 292.5 S K
13) MAY 105 14) OIL 75 15) GEM 225 16) CHU 165 17) PUN 247.5 18) SOI 330
() ABC B () DEF E
ABC DEF = 2 ()