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27 tháng 7 2020

Giúp mình với

27 tháng 7 2020

xoy và yoz phụ nhau = 180*

ta có xoy + yoz = 180*

=> xoy + 35* = 180*

=> xoy = 180* - 35 *

=> xoy = 145 *

14 tháng 3 2018

Đã là bài hình thì bn vẽ hình ra là sẽ làm đc ngay bn mến nhé

26 tháng 3 2018

Minh da ve hinh nhung khong giai duoc phan b nen ban giai ho minh nhe

9 tháng 3 2019

thank you bạn nào trả lời trước cho .... với câu trả lời hợp lí !

thank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank youthank you !

9 tháng 3 2019

2 goc bu nhau chu

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

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 = \(150^0\)