Cho hinh tam giac ABC co canh AB dai 25cm tren canh BC lay hai diem M va N dao cho BM = 2/6do dai BC do dai doan NC bang 1/6 do dai BC biet chieu cao ke tu Mcua hinhbtam giac AMB la 12cm tim dien tich cua hinh tam giac ANC va AMN
cho hinh tam giac ABC vuong o dinh A , canh AB co do dai bang 25 cm, tren canh BC diem M va diem N sao cho doan BM bang 2/3 doan MN, doan CN bang 1/2 doan MN, biet chieu cao MH cua tam giac ABM bang 12cm.Tinh dien tich tam giac ABC.Cac ban nho ve hinh cho mk nhe, cam on nhiu.
cho tam giac ABC co so do AB=25cm tren canh BC lay 2 diem MN sao cho doan BM=2/3 do dai doan mn tim dien tich tam giac abc biet tam chieu cao tam giac AMB ke tu M=12cm
cho hinh tam giac abc , canh bc co do dai 9cm.Keo dai canh bc ve phia b tren do lay diem d sao cho bd co do dai 6cm .Tinh dien tich hinh tam giac abc ,biet dien tich hinh tam giac abd la 18cm vuong.
CHO TAM GIAC ABC CO DIEN TICH LA 12CM2 . LAY DIEM M TREN CANH BC . BIET DIEN TICH ABM=8CM2 VA BC = 25CM. TINH DAI DOAN BM VA MC
cho tam giac ABC ,diem D nam tren canh AC ,diemEnam tren canh BC sao cho: AD=DC,BE=3 phan 2 EC.Cac doan thang AE va BD cat nhau o K.BK gap may lan KD?tinh dien tich hinh DKEC biet dien tich tam giac ABC bang 80cmvuong
cho hinh tam giac abc co dien tich bang 90 cmvuong .keo dai day bc , lay diem d sao cho do dai bd gap ruoi do dai bc. tinh dien tich hinh tam giac abd
Cho hinh tam giac ABC co dien tich bang 250cm vuong. Keo dai day BC, lay diem D sao cho do dai BD gap ruoi do dai BC (nhu hinh ve). Tinh dien tich hinh tam giac ACD?
cho hinh tam giac abc co dien tich bang 250 cm vuong . keo dai day bc , lay diem d sao cho do dai bd gap ruoi do dai bc. tinh dien tich hinh acd