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dariyacherdgen
@dariyacherdgen
July 2022
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Помогите,пожалуйста,с 1,2,3,4 задачей
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kirichekov
Verified answer
1. ΔA₁SA₃: <SA₁A₃=30°, =>SA₃=6:2=3(катет против угла 30°)
(А₁А₃)²=6²-3², А₁А₃=√27=3√3
Sпир=(1/3)Sосн*H
Sосн=(1/2)А₁А₃*А₂А₃*sin45°
Sосн=(1/2)*3√3*4*(√2/2)=3√6
Sпир=(1/3)*3√6*3=3√6
№ 3 и №4 во вложении
1 votes
Thanks 1
kirichekov
№3, №4 набирала в редакторе формул, поэтому нужно несколько раз кликнуть, чтобы открылось
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Answers & Comments
Verified answer
1. ΔA₁SA₃: <SA₁A₃=30°, =>SA₃=6:2=3(катет против угла 30°)(А₁А₃)²=6²-3², А₁А₃=√27=3√3
Sпир=(1/3)Sосн*H
Sосн=(1/2)А₁А₃*А₂А₃*sin45°
Sосн=(1/2)*3√3*4*(√2/2)=3√6
Sпир=(1/3)*3√6*3=3√6
№ 3 и №4 во вложении