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18 tháng 1 2016

ta thấy góc NPO = góc NOy = 50 độ ( so le )

xét tam giác vuông NMP có

góc NPO + góc MPN = 90 độ ( tính chất tam giác vuông )

=> góc MPN = 90 độ - góc NOP =90 độ - 50 độ =40 độ

 

 

10 tháng 9 2017

treuyrht5tttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttt

4 tháng 10 2019

a

) x O y M A B d

b

A O B m C n D M

c

A B C d 1 2 d D

d

A B C

ĐÃ VẼ LẠI 2 LẦN.LẦN NÀY LÀ LẦN 3

=> CUỘC ĐỜI ĐEN NHỌ CỦA COOL KID :V

5 tháng 9 2018

x O y M P E N Q

a. những cặp đường thẳng song song :

MN // PQ ( cùng vuông góc với Ox)

NP // QE ( cùng vuông góc với Oy)

b. EQP= 50o

QPE=40o

QPN=50o

QNP=40o

PNM=50o

NMP=40o