Cả nhà ơi, giúp mình với nhé.Bài này liên quan đến cả bài 2nên mình gửi cả bài 2 nhé

cho tam giác ABC vuông tại A,có AB=9cm,BC=15cm.trên tia đối AB lấy điểm E SAO CHO A LÀ TRUNG ĐIỂM CỦA BE A,tINHS ĐỘ dài cạnh AC và so sánh các góc của tam giác ABC b,CM:TAM giác ABC+tam giác AEC c,vẽ đường trung tuyến BH của tam giác BEC cắt cạnh AC tại M.CM M là trọng tâm của tam giác BEC và tính độ dài đoạn CM d,Từ A vẽ đường thẳng song song với EC,ĐƯờng thẳng này cắt cạnh BC tại K.CM 3 điểm E,M,K thẳng hàng

Một vật hình trụ có chiều cao bằng 2/3 đường kính đáy. Biết thể tích hình trụ đó bằng 36 pi (cm^3). Tính diện tích xung quanh nó

Giúp em giải thích tại sao lại có 3điểm cực trị ạ

1)Nếu sự tương tác giữa 2 vật nhiễm điện 2) a 1,2A= mA b)125mA= A c)400V= mV 3)Tại sao vào những ngày nắng khi ta dùng khăn lau bản khi oa thấy có nhiều bụi bị dính hơn

Instructions: Read the email and choose the correct option (ac) to complete the sentences (15). Dear Mum and Dad, I'm writing this email because I've got some important news to tell you. I'm getting married! Isn't that great? It all happened last night. We were having dinner in a very nice Italian restaurant when Jake suddenly became all quiet and said he had something to tell me. He looked so serious that I was afraid he was going to break up with me or tell me he had a terrible illness, but then he took a little black box out of his pocket and put it in front of me. I opened it and inside was an engagement ring and he just said, 'Will you marry me?' I was so excited that I didn't even stop to think about it and replied, 'Yes, of course I will, silly!' And I put the ring on my finger. So there we were, engaged! Then we spent the rest of the evening making plans. Can we have the wedding at your house? You've got such a big, beautiful garden that it'll be perfect. We are going to wait until after my final exams in June and I thought a good day would be 10th July. That gives us eight months to plan everything. It should be enough time, especially as we don't want a big traditional white wedding  just a big party with our best friends and family. We're not going to start a family straight away because I need to get my career going, and I might even decide to stay on at university and do a master's, but before we do that, we're going to travel round the world for a year. Jake can take a career break for that time; his office have already said it's OK. It's so exciting! Anyway, I have to get to class now. I'll phone you tomorrow. Your loving daughter, Lucy ____ 37. Lucy ____. a. goes to school b. is a university student c. works in an office ____ 38. Jake told Lucy he ____. a. was worried about something serious b. was seriously ill c. wanted them to get engaged ____ 39. When Jake asked Lucy, she ____. a. replied immediately b. didn't say anything c. didn't know what to say ____ 40. Jake and Lucy are going to have ____. a. a big white wedding b. a traditional wedding c. a fun celebration ____ 41. After the wedding Lucy is going to ____. a. go back to university b. go abroad c. have a baby

Vẽ mầm ăn kem có màu nhá nóng quá ik

x bình trừ bốn x cộng 2m lam sao tinh can denta a

Toán 8, giải dùm mình với ạ. Mình đang cần gấp, cảm ơn nhiều. Hứa sẽ cho câu trả lời hay nhất.

Vẽ chibi or anime zui muốn gớt lước mắt ik:Đ Năm nay mn đc HS j nek Me:HSG;-;