文档介绍：∠ABC=30
∠CDE=68
得;
∠BOD=68+30=98
又;CF平分∠BCD
又;AB平行ED
∴∠FCD=98-68=30
5页8题
∠QOC=88 则∠BCD=2DCO
∠BOD=45 所以∠ABO=45
5页9题
画图略
AB垂直CD
根据反射光线CD
5页10题
1、∠B=∠C
2.∠B+∠C=∠A
3、∠a+∠C=∠B
4、∠C>∠A>∠B
5、∠B与∠A、∠C为内错角
7页快乐行动
1大题
ANGUAGE
OULD
OWN
UMMER
LEEPS
2大题
C
C
B
A
C
A
B
C
3大题
c
H
B
I
D
G
J
E
F
A
11、∠AOD;∠DAB=3;1
3X+1X=180
X=45
所以∠DOC=45
.OC垂直AB
12.
∴原△ABC面积的2倍。因为两者平行
17页7
3X2=6CM平方
19页3大题
WHAT THIS?
LET’S SEE THE TIGER FIRST
DO YOU LIKE ANIMALS
WHAT ANIMALS DO YOU LIKE
WHERE IS YOUR PEN PEL FROM
22页的快乐成长
鹂鹭
百灵
马
骊笛
蛙
飞
霜
鸭
24页10 11 12 13
10.∠ADB=180-54=126
∠ADC=180-72=108
2.∠EDC=90+72=162 180-162=18
-3=2CM
△ABD<△ACD
-180=945
25题1 3
AST WEEKEND
EACH
OOKING
EATER
URSE
3大题
GET UP
GET TO
SPEAK TO
LOOK FOR
TAKE OFF
THERE BE
SEE A DOCTER
IN ONE’SSPARE TIME
PUT ON
GET BACK
26页1题
B
D
A
G
F
C
I
J
D
H
27页3小题
男扮女装
30页10 11 12 13
10.∠1=110
∠2=85
∠3=∠ABC=30
11.∠DBC=∠ABD
∠DCB=2∠ACD
所以A=30
31页2
GIVE FOR
HOW MUCH
WHO IS
FAVORITE COLOR
WHERE IS
HOW MANY
35页1 2 3 4题
化简,繁为简加减消元和代入消元代入消元为宜加减消元法为宜整体代入求解
X+3Y=2 X=2-3Y
2分之1 1
3 1
36页10 11 12 13
=4 Y=8
=3 Y=6
11.∴当X=--3时
Y=-3+3分之1-3分之2
Y=-33
=780
X=1200
Y=1800
37页 2 3
第2道题
HAS SOM