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Tim dien tich tam giac ABC biet MH=12cm,AB=25cm.Doan thang BM=2/2 doan thang MN.Doan thang NC=1/2 doan thang MN.
tim dien tich tam giac ABC biet MH=12cm.doan thang BM=1/2 doan thang MN
CHO TAM GIAC ABC CO dien tich la 48 cm vuong ,M la trung diem cua doan thang AB ,N LA TRUNG DIEM CUA DOAN THANG BM ,Q la trung diem doan thang AC , P la trung diem cua doan thang QC . DIEN TICH HINH TU GIAC MNPQ
cho tam giac abc. Diem m la diem chinh giua canh ab. Tren canh ac lay diem an bang 1/2 nc. 2 doan thang bn va cm cat nhau tai k.hay tinh dien tich tam giac akc biet dien tich tam giac akb la 42 dm2
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 thang ABCD. Day ab bang 1/3 day cd, doan ac cat bd tai o. tim dien tinh tam giac abc va abd biet dien tich hinh thang la 48 cm2
TAM GIAC ABC CO DUONG CAO AH DAI 3 CM , DOAN THANG HB DAI GAP DOI DOAN THANG HC . CHO BIET DIEN TICH HINH TAM GIAC VUONG AHC BANG 3 CM2 TINH DIEN TICH TAM GIAC ABC
cho hinh tam giac co so.do canh ab=25cm tren canh bc lay hai diem m;n sao cho do dai doan thanh bm banh 2/3 do dai doan thang m;n do dai doan thang mn ;tìm s tam giac abc biết chiều cao tam giac amb ke tu m =12cm
Cho hinh chu nhat ABCD, lay diem M tren canh CD sao cho MD bang 1/3 CD, lay diem N tren canh BC sao cho BN bang 1/3 BC. Doan thang AC cat BM tai P, doan thang AN cat BM tai Q. Tinh dien tich hinh tu giac PQNC biet dien tich tam giac APQ la 216 cm2.