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A.(1)???????.

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Title: 1 Author: thtf Last modified by: teacher Created Date: 12/27/2004 5:23:31 AM Document presentation format: Other titles – PowerPoint PPT presentation

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Title: A.(1)???????.


1
??? ?????????????
2
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  • (1)????????

???? ?? ?? ?? ?? ?? ?? ?? ????
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3
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??????? ??????? ??? ???? ???.

??????? ??????????, ?? ???????
,?????????? ???? ????
4
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1.??? A.(1)???????. (2)??????????.
(3)????????,??????.
(4)??OA???AO??????. (5)??A???BC???,??BAAC.
(6)?ABBC,???B?AC???.
(7)??????????????.
5
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2.?????? A.(1) ??????? ???,? ??????
???. (2) ??????????,????? ?,??? . (3)
????????????,??? ???,????_________________.
6
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(4) A.P.Q.B??????,?? ???, ???,
???. AQAP AB APAQ AB
PQ . ???P???AQ???,?AP2.5
cm, ?PQ cm, AQ cm. ??PQQB2.5cm,?Q?
PB? PB cm.
7
????
B.(1)????AB5cm,BC4cm, ?A?C??????( )
A.1cm C.1cm?9cm B.9cm
D.??????? (4)??????A?B?C,??AB8, AC5,BC3,?(
) A.?C???AB? B.?C???AB????? C.?C???AB?
D.?C?????AB?,??????AB?
8
????
1.??????A?B?C??,AB8cm,BC2cm,??O???AC???,?OB???.
9
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1.????????A?B?C??,AB8cm,BC2cm,??O???AC???,?OB??
?.
10
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1.????????A?B?C??,AB8cm,BC2cm,??O???AC???,?OB??
?.
11
????
(2)????AB8cm,???AB????BC,????3cm,???AC
cm. (3)????????A?B?C??AB8??, BC10??,??O???AC???
, ?OB cm.
12
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(6)B?C???AD?????,M?AB???,N?CD???,?MNa,BCb.???AD?
??( ) A.2(a-b) B.2a-b C.ab
D.a-b
13
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1.???? 2.???? 3.????
???????????????????.
14
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4.?????? ???? 5.??????? 1.5
600 2.5 6.?????

15
  • ??,AP?CP,BP?DP,?138,?APD_____?

????
142
16
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  • 1.?ABC???,??B??????BD??ABC???DBA??DBC,??BD??ABC???
    ??,
  • ?DBA?DBC
  • ??BE?BF????DBA??DBC?????,???EBD?DBF

17
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2.(??)
3
2
4
1
??,???????,????A??A?,BC???,??ABD ?DBE,??CBD????
18
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19
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1.???????????. ( ) 2.?ABBC,???B?AC???.
( ) 3.??????????????. ( ) 4.????,???80cm,??13
0cm, ???????,????????, ?????????????????
5.????????A?B?C??,AB10cm, BC6cm,??O???AC???,?OB
???.
20
C?D????????AB??,?????????,????? A?B????????AB??,??
??????????????
????
21
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