Xin chao moi nguoi,cac gia su. MINH CO MOT BAI TOAN LOP7 CHUA LAM DUOC,XIN MOI NGUOI GIANG DAY: Cho biet tam giac AMN vuong tai A,co AM<AN. a)Cho biet tam giac AM=12cm,MN=37cm.Tinh do dai canh AN va so sanh cac goc trong tam giac AMN.  

              b)Goi I la trung diem cua AN.Tu diem I ve duong thang vuong goc voi AH tai I,duong thang nay cat MN tai diem B.Chung minh tam giac ABI=t/giac NBI

              c)Tren tia doi cua tia BA lay diem C sao choBC =BA,CI cat MN tai D.C/minh MN=3ND

 Minh xin moi nguoi chi giup,  hay lien he voi minh khi ban co cau tra loi gan nhat .Xin cam on(moi nguoi ve hinh luon a!)

Xin chao cac ban,cac gia su.Hom qua,minh co mot bai toan lop7 chua lam duoc,bay gio da co cau tra loi-cam on ban Lai Tri Dung nhe.Bay gio,minh co mot cau hoi nua,mong moi nguoi chi giup minh a!

   CHO tam giac ABC can tai A.Ve AH vuong goc voi BC tai H.

a)Cho biet AH=8cm.Tinh do dai doan thang BH.

b)Chung minh rang:tam giac HAB=t/giac HAC

c)Goi D la diem nam tren doan thang AH.Tren tia doi cua tia DB lay diem E sao cho DE=DB.CMR:AD+DE>AC.

d)Goi K la diem tren doan thang CD sao cho CK=2/3CD.CMR:3 diem H,K,E thang hang

   Minh mong la co cau tra loi

 som nhat. CAM ON NHIEU LAM AAAAAA!

Xin chao tat ca moi nguoi-minh la mot hoc sinh.len day muon hoi mot cau hoi ve toan hoc.Mong moi nguoi giup do.Cho don thuc:M=1/3xy(-3xy²)².

Thu gon M roi cho biet phan he so va phan bien cua don thuc tren.

Minh da lam duoc roi nhung minh muon len day de hoi moi nguoi lam the nao de minh khao lai ket qua cua ming co dung khong.Ban nao hay la giao vien hay la gia su nao lam duoc thi cho minh mot cau tra loi dung va chinh xac nhat gui cho minh nha.Minh cam on nguoi da giai duoc cau nay nhe.Lien he voi minh gan nhat nheeeeee!

Xin chao tat ca moi nguoi,giup mimh bai toan nay voi nak.(Toan lop 7-hinh hoc nha)

Cho tam giac ABC vuong tai A,AB=6cm,AC=8cm.

a)Tinh BC

b)So sanh goc ABC va goc ACB.

c)Tren canh BC dat diem H sao cho BH=BA.Ve duong thang di qua H vuong goc voi BC cat AC tai D.Chung minh:tam giac ABD=tam giac HBD,tu do suy ra BD la tia phan giac cua goc ABC.

c)Hai duong thang BA va HD keo dai cat nhau tai E.Chung minh tam giac CDE can.

  Ai co cau tra loi dung,chinh xac nhat gui cho

minh nha. Minh cam on ban nhieu,nho la ve hinh nua nha ban!!!

Mot cong chua vuong quoc no noi tieng la thong minh .Khi ken chong, nang ra dieu kien :Trong thoi gian ba ngay,ai ra duoc cau hoi nang khong tra loi duoc thi nang se lay lam chong .Nhieu chang trai den thu tai va deu chiu thua truoc su hieu biet cua cong chua .

Cuoi ngay thu ba ,mot nha toan hoc tre tuoi den xin thu tai. Chang dat cau hoi cho cong chua:

-Xin cong chua hay cho biet , toi phai hoi cau gi de cong chua khong tra loi duoc?

Hay xet xem voi cau hoi nay nha toan hoc co ket duyen duoc voi cong chua hay khong?

gia tien 1 quyen vo mong la 2500 dong , 1 quyen vo day la 4000 dong . co giao da mua mot so vo mong va mot so vo day het 31000 dong . co giao nham tinh rang : neu doi so vo day dung bang so vo mong va doi so vo mong dung bang so vo day da mua thi phai tra them 3000 dong nua . hoi co giao da mua bao nhieu quyen vio moi loai ?

    CAC BAN GIAI THICH CHO MINH CAU : neu doi so vo day dung bang so vo mong va doi so vo mong dung bang so vo day da mua thi phai tra them 3000 dong nua . hoi co giao da mua bao nhieu quyen vio moi loai ?

     MINH NHAC LAI NHA . CAC BAN GIAI THICH CHO MINH CAU NAY NHA , CHU KHONG PHAI GIAI BAI TOAN 

    CAU NAY CO NGHIA LA :............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................