cho hình vuông ABCD. Từ điểm M thuộc cạnh BC vẽ đường thẳng cắt CD tại K

sao cho AMB=AMK. kẻ AH vuông góc với MK ở 

c/m tam giac ABM=AHM va AH=HD

b, c/m tam giac DAK= tam giac AHK

c, c/m MAK=1/2 A= 45 do

(3x-2)(3x+2)-9(x-1).x=0

cho tam giác abc cân tại A,lấy điểm D bất kỳ trên AB, lấy điểm E trên tia đối của tia CA sao cho CE=BD. từ D kẻ đường thẳng song song với AC cắt BC tại F

1.tam giác DBF là tam giác j?

2.c/m DCEF là hình bình hành?

cho hình bình hành ABCD, gọi m,n,p,q lần lượt là trung điểm của ab,bc,cd,da

a, CM mn=pq

b,C/M MNPQ là hình bình hành

choose the word is pronounced differently 

orangES clothES sandwichES boxES

11.Traffic reaches its ___________ between 7 and 8 in the morning.

A.height                     B.peak                        C.top                           D.jam

12.___________ of the library, my friend went in.

A.Coming out           B.When came out     C.On coming out      D.As I came out

13.Many countries are developing high-speed trains as part of their public ___ system.

A.transport                B.travelling               C.carrying                  D.road

14. Lots of people ___________ yoga to relax and improve their health.

A.play                        B.take up                   C.make                       D.practise

15. He'll never pass his driving test ___________ he takes more lessons.

A.unless                     B.if                              C.because                  D.when

16. What will you do if you have an opportunity to ___________ on a spaceship?

A.travel                      B.come                       C.pass                         D.move

17.- “___________ tell me the way to The Museum of Fine Arts?”
- “I'm sorry, I'm a new comer here, too.”

A.Excuse me, can you                                 B.Sorry, but could you        C.Excuse me, should you                             D.Hey, do you think you can

18. She couldn't go far because she was afraid of ___________.

A.to fly          B.fly                           C.flying                      D.be flying

19. You can't enter the theatre while the play is in ___________.

A.action                     B.acting                      C.performance          D.progress

20. Higher education in the US began in 1636 when the first colonists ___________ Harvard College.

A.found                      B.originated              C.founded                  D.made