Cho hai góc phụ nhau xOy và yOz, biết xOy= 35 độ. Tính yOz
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26 tháng 3 2018
Minh da ve hinh nhung khong giai duoc phan b nen ban giai ho minh nhe
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9 tháng 3 2019
thank you bạn nào trả lời trước cho .... với câu trả lời hợp lí !
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youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank 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28 tháng 4 2018
a) ta có 2 góc xOy và x'Oy là 2 góc kề bù nên :
góc yOx + góc yOx' = 180 độ
=> 45 độ + góc yOx' = 180 độ
góc yOx' = 180 độ - 45 độ
góc yOx' = 135 độ
b)mik ko bít cách tính chỉ bít kết quả thui . kết quả : tOx' = 45 độ
c) tia Ot' ko thể là tia phân giác của góc yOx' vì góc yOx' = 135 độ ko thể chia 2
30 tháng 9 2016
\(5\widehat{xOy}=4\widehat{yOz}\Rightarrow\frac{\widehat{yOz}}{5}=\frac{\widehat{xOy}}{4}=\frac{\widehat{yOz}-\widehat{xOy}}{5-4}=\frac{10^0}{1}=10^0\)
\(\Rightarrow\widehat{yOz}=50^0;\widehat{xOy}=40^0\Rightarrow\widehat{yOz}+\widehat{xOy}=50^0+40^0=90^0\)
mà\(\widehat{yOz}+\widehat{xOy}=\widehat{xOz}\)(vì\(\widehat{xOy},\widehat{yOz}\)kề nhau) nên\(\widehat{xOz}=90^0\)=> Ox vuông góc Oz
11 tháng 6 2021
a)Vì góc xOy và góc yOz là 2 góc kề bù
suy ra:xOy +yOz =180\(^0\)
thay xOy =60\(^0\) có:
60 \(^0\)+yOz =180\(^0\)
yOz =180\(^0\)-60\(^0\)
yOz =120\(^0\)
Vậy yOz=120\(^0\)
b)Vì Ot là tia phân giác của góc xOy
suy ra:xOt=tOy=xOy:2=60\(^0\):2=30\(^0\)(thay xOy=60\(^0\))
Vì Oy nằm giữa 2 tia Ot và Oz
suy ra:tOy+yOz=zOt
thay tOy=30\(^0\);yOz=120\(^0\)
30\(^0\)+120\(^0\) =zOt
150\(^0\) =zOt
Vậy zOt= 150\(^0\)
11 tháng 6 2021
Ta có: ∠yOz + ∠xOy = 180\(^0\) ( hai góc kề bù )
∠yOz + 60\(^0\) = 180\(^0\)
∠yOz = 120\(^0\) (1)
Ta có: ∠yOt = \(\dfrac{60^0}{2}\) = \(30^0\) ( vì Ot là phân giác ∠xOy ) (2)
TỪ (1) VÀ (2)
⇒ ∠yOz + ∠yOt = ∠zOt
120\(^0\) + \(30^0\) = ∠zOt
\(150^0\)= ∠zOt
Vậy ∠zOt = \(150^0\)
