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1. Can Peter repair the bike ? ( skilful )
~> No , he ________________________isn't skilful enough to repair it.
2. Will you take a rest after lunch ? ( tired )
~> Yes , I _________________am tired enough to take a rest after lunch.
3. Can I work with these men ? ( old )
~> No , you _____________________aren't old enough to work with him
4 . Can she join our club ? ( old )
~> Yes, she ______________is old enough to join our club.
5. Can they hang the picture on the wall ? ( tall )
~> No, they ___________________ aren't tall enough to hang it on the wall.
6. Did you wear this coat last winter ? ( cold )
~> No , it was ________________ cold enough to wear this coat.
7. Can you listen to the music on the radio ? ( clear )
~> No, it ___________________ isn't clear enough to listen to the music on the radio
8. Will you buy the new CD of the band ? ( good )
~> Yes, the songs are __________________ good enough to by the new CD of the band.
9. Can we swim early in the morning these days ? ( warm )
~> Yes, the water is______________________ warm enogh to swim in the morning these days.
10. Why don't we sit ouside? ( cool )
~> Yes, it's __________________ cool enough to sit ouside.
a) Góc ngoài còn lại: =3600 – (750 + 900 + 1200) = 750
Ta tính được các góc ngoài tại các đỉnh A, B, C, D lần lượt là:
1050, 900, 600, 1050
b)Hình 7b SGK:
Tổng các góc trong + ++=3600
Nên tổng các góc ngoài
+ ++=(1800 - ) + (1800 - ) + (1800 - ) + (1800 - )
=(1800.4 - ( +++ )
=7200 – 3600 =3600
c) Nhận xét: Tổng các góc ngoài của tứ giác bằng 3600
học tốt
1. He is used to------------ up early in the morning.
A. get B. getting C. have gotten D. got
2. The boy was kept indoors----------- naughty.
A. to be B. have been C. for being D. when he
3. I shall never forget-----------with you to Paris last year.
A. staying B. to staying C. to stay D. stayed
4. I am looking forward to -----------you.
A. having seen B. seeing C. to see D. all are wrong
5. I am always remember------------ off the lights before I leave my house.
A. turning B. to turn C. turned D. being turned
a)Ta có:
\(\dfrac{OA}{OC}=\dfrac{5}{8};\dfrac{OD}{OB}=\dfrac{10}{16}=\dfrac{5}{8}\)
\(\Rightarrow\dfrac{OA}{OC}=\dfrac{OD}{OB}\)
Mà có O là góc chung nên \(\Delta OCB\) đồng dạng với \(\Delta OAD\) (trường hợp 2)
b) ΔIAB và ΔICD có: ∠CID = ∠AIB (góc đối đỉnh) ∠ODA = ∠OBC (t/c) ⇒ ∠ICD = ∠IAB ( Định lí tổng 3 góc tam giác) .
Vậy ∠IAB và ICD có các góc bằng từng đôi một.
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Vl/ speaking: questions