cần gấp ạ

Across
5 My younger brother can be really............. and he often gets into trouble. (7)
9 Ben is really serious and I don't think he has a............. (5,2,6)
11 I passed my exam! Let's go out and............. (9)
Down
1 Harry isn't very good at volleyball, but he's really.............. He puts a lot of energy into it. (12)
2 Jack is quite confident now, but he used to be really............. and didn't like meeting new people. (3)
3 You look.............  with that hat on. Take it off! (10)
4 I didn't have enough money to pay for the meal! It was really.............  (12)
6 I'm trying to work, and that loud music is beginning to............. me! (5)
7 The Petersons moved house because living on a main road was very ............. . (5)
8 You gave Jane a dozen roses on her birthday? Oh, that's so.............  ! (8)
10 It was very................  of Nicky not to thank you for her present. (4)

BÀI 1

Cho ΔABC vuông tại A có AB = AC, qua A vẽ đường thẳng xy (B và C nằm cùng phía với xy) kẻ BD và CE vuông với xy

a) vẽ hình

b) chứng minh rằng : ΔBAD = ΔACE

c) chứng minh rằng : DE = BD + CE

BÀI 2 

cho ΔABC biết D là trung điểm của AB, đường thẳng đi qua D và song song với BC, cắt AC ở E, đường thẳng E song song với AB cắt BC ở F

a) chứng minh rằng AD = EF

b) chứng minh rằng Δ ADE = Δ EFC

c) chứng minh rằng AE = EC