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A.
m3×w=ðíM`wlNëõ`wl
B.
×X)íMëõ`wlN!l
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_3DwíMëõ`wlNEl
D.̀
ÁwíM`wlNKul
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Oh
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FEl·G
ABCD
MmÑN
24m,
∠BAD=60°,C·G×X)BDMÑ
( )
A.6槡3m B.6m C.3槡3m D.3m
2
.h
4
.h
5
.h
3.
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Rt△ABC<,c∠A=30°,∠C=90°,[D:wAB
M<[
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C△BCD: ( )
A.
k_Xl
B.
kWX_Xl
C.
w_Xl
D.
+qLÇ
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Kul
ABCD
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/Kul
ABCD
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B
MY*
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5.
Oh
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Q!l
ABCD
EF
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c∠1=50°,C∠AEF
Mã2N
( )
A.110° B.115° C.120° D.130°
6.
OPElMmÑ:
8.4cm,
íDmX¢º:
5∶1,
YZ
El_3×w¢"Mîf:
( )
A.4.2cm B.2.1cm
C.1.05cm D.0.52cm
7.
;Kul
ABCD
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E
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BD
R
,
G
AB=BE,
2Ñ
CE
AD
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C.112.5° D.67.5°
8.
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ABCD
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AC、BD
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[
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AD
wM<[
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El
ABCD
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36,
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OH
MÑ
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8
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9.
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OP{|M½w=
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10.
Oh
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;!l
ABCD
<
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:×X)[
,∠DABMë
=)
BD
[
F,
CD
[
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zwMîf=ð:
1,3,5,7,
C5
!lM¤U½w:
.
12.
;El
ABCD
<
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×X)Ñ
AC=8cm,BD=6cm,
CwÑ
AB= cm.
13.
Oh
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{Kul
ABCD
M_w
AD
:wªbw
△ADE,C∠ABEMã2N .
13
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14.
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c!l*0m?íDMKul
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½w=ð:
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CþÙ¶=M½w:
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15.
Oh
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m?ÐMElMwÑ:
1cm,
_JKL0
A
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ABCDEFCGA
M>NElMwOøÍ®
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2020cm
PH
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C/JKLP;
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Oh
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Kul
ABCD
M×X)í
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O,
[
O
ANQ
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A′OC′D′
M[
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cm?KulMwÑS
N
2,
CmRSo¶=M½wN
.
16
.h
17
.h
17.
Oh
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;!l
ABCD
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×X)
AC、BD
í
[
O,
AE⊥BD
[ E,c OE∶ED=1∶3,AE=槡3,C BD
=