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lili1511
@lili1511
July 2022
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anmih
Verified answer
1) тр АВС подобен тр ВДС по двум углам
АВ / ВД = ВС / ДС = АС / ВС = k ;
2) BC / 9 = 16 / BC
BC^2 = 9*16
BC^2 = 144
BC = 12
3) k = 16 / 12 = 4/3
4)
BD / AB
= 1/k
=
3/4
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Answers & Comments
Verified answer
1) тр АВС подобен тр ВДС по двум угламАВ / ВД = ВС / ДС = АС / ВС = k ;
2) BC / 9 = 16 / BC
BC^2 = 9*16
BC^2 = 144
BC = 12
3) k = 16 / 12 = 4/3
4) BD / AB = 1/k = 3/4