7-sinflar Matematika olimpiada №3

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7-sinflar Matematika olimpiada №3

29.12.2022 yil oo.uzedu.uz

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Hisoblang:

I

II

IV

III

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Umumiy AB asosga ega bo`lgan ACB va ADB uchburchaklar berilgan. CD va AB lar O nuqtada kesishadi. Agar ∠DAB= ∠CBA, ∠CAB= ∠DBA, DB=24 sm bo`lsa, CA ni toping.

12 sm

24 sm

48 sm

30 sm

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D

B

C

A

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C

B

D

A

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A

D

C

B

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B

D

A

C

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D

B

A

C

8 / 25

A

C

B

D

9 / 25

A

D

C

B

10 / 25

C

D

A

B

11 / 25

A

D

C

B

12 / 25

A

C

B

D

13 / 25

C

D

B

A

14 / 25

D

B

C

A

15 / 25

B

A

D

C

16 / 25

C

B

A

D

17 / 25

B

A

C

D

18 / 25

D

C

B

A

19 / 25

A

C

D

B

20 / 25

B

C

A

D

21 / 25

C

B

A

D

22 / 25

D

C

A

B

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C

B

D

A

24 / 25

C

D

A

B

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A

D

B

C

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