???? ?????? ABC ??? ?????? ABC ????? ?????? ???????? ?????? B , C A , ??? ??? : ????? ABC ?? AB , BC , CA ?????? ?? : A , B , C ??????? ?? :

1
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3 - 1
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???? ?????? ABC ??? ?????? ABC ????? ??????
???????? ?????? B , C A , ??? ??? ????? ABC
?? AB , BC , CA ?????? ?? A , B ,
C??????? ??
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3 2
????? ??????
15

• ??? ???? ???? ??????? ?? ?????? ???? ???? ?????
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  ????? ?????? ????? ?? ???? ????? ??????180 ? .

16
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• ????? ??????? ???????? ?? ????? ?? ?????? ???
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21
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• ??????? ??????? ???????? ?????? ??? ???????. ???
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3 - 3
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• ???????? ???? ??? ??? ?????? ?????? ???? ??????
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3 4
????? ??????? ????? SSS , SAS
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• ????? SSS .
• ?? ?? ??????? ?? ????? ????? ??????? ?????????
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40
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??
43

• ????? ??????? ????? ??????? ??? ???????
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44
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• ????? SAS ??? ?????? ???? ????? ?? ????
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3 - 5
????? ????? ????? ASA, AAS
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• ????? SSS .
• ????? ??? ?????? ????? ??????? ???? ?????
  ??????? ?????? ????? ?????????? ???? ??? ????????
  ??????? ???????

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3 - 6
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• ????? ???????? ????????? ??????? ??????
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64
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• ????? ?????? ???????? ???????
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3 - 7
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• ?? ????? ???????? ????? ?? ??? ?????? ????? ??
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• ????? ???????? ??? ??? ????? ?? ???????
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76
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