VẼ HÌNH THEO TRÌNH TỰ

- vẽ tam giác ABC(AB<AC)

- qua A vẽ d vuông góc BC

- vẽ d là đường trung trực của BC

chứng minh d// d1

-qua B,C kẻ d và d2 cùng // d1

chứng minh d2//d3; d2 vuông góc BC; d3 vuông góc BC

cho hình vẽ

AB // CD

AC//BD

Tính FCG?

cho hình vẽ. chứng tỏ AD vuông góc vs DC

cho x/5= y/8 =z/11
tính a, N= 6x-7y+4z/6x+7y-4z
b, M= 6x-7y+4z/6x+7y-4z

ĐIỀN CÁC TỪ CHO TRƯỚC VÀO CHỖ TRỐNG
obesity , healthy , lifestyle, diet, healthcare , recover, allergy, cough, weak, loseweight
1 Many people playsports to keep fit and stay..................
2 That's a bad ..........., you really must stop smoking
3 the increase in...............in young children today is a result of fatty and lack of exercise
4 Drinking lots of water and exercise can help you to..................effectively, not skipping meals
5 Tom has..............from his operation and has returned home from the hospital
6 You're putting on a lot of weight, why don't you go on a .................
7 Many people today are aware of the importance of a healthy.............and physical exercise in hospital fits
8 because you have an.................to animal hair, I won't let you cát or dogs...............
9 I think..............should be avaitable to all people, regardless of their im come
10 Tom is still.............after hos illness. He can't go to school

cho góc AOB=140độ. trong góc ấy vẽ các tia OC và OD sao cho OC vuông góc với OA, OD vuông góc vs OB
a, chứng tỏ góc AOB = BOD
b, tính góc DOC
C, vẽ tia OM là tia phân giác của góc AOB. tia OM có phải là tia phân giác của góc COD không ? vì sao?

cho hình vẽ:

biết Aa// Cc

∠A1=25 độ; ∠C1 = 50 độ

Tính∠ABC

a, tính góc D1

b, Chứng tỏ a ⊥d

CHO HÌNH VẼ: TÍNH GÓC A1

VIẾT LẠI CÂU SAO CHO NGHĨA CÂU KHÔNG ĐỔI
1 It was such a boring film that she feel asleep
-> The film
2 The furniture was so expensive that I đin't buy it
-> The furniture
3 He can touch the light because he's very tall
->He is
4 Somebody repaired his car yesterday
-> he had
5 It three months since Iast spoke to her
-> I
6 You shouldn't spend your weekend in the city
-> She advised me
7 He faildes the exam because of his laziness
-> Because he
8 It's six-hour drive from London to Endinburgh
-> It takes