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мася12345678910
@мася12345678910
July 2022
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Помогите пожалуйста плиз!
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Opolishuk
1) S прям=a*b
S прям=200 см2
2) Sтр=(p-a)(p-b)
pтр=(a+b+c):2
р=(9+12+15):2=36:2=18 см
Sтр=(18-9)(18-12)=9*6=54 см2
3) 200-54=146 см2
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мася12345678910
как ты написал мы ещё не изучали!
caterinaveselo
S=1*20*10*8*9*12=172800
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Answers & Comments
S прям=200 см2
2) Sтр=(p-a)(p-b)
pтр=(a+b+c):2
р=(9+12+15):2=36:2=18 см
Sтр=(18-9)(18-12)=9*6=54 см2
3) 200-54=146 см2