cho hinh thang vuong ABCD co dien tich bang 16 cm2 ,ABbang1/2 CD keo dai DA va CB cat nhau tai M tinh dien tich MAB

Cho hinh thang vuong ABCD co dien tich la 16 cm2.AB=1/3 CD. Keo dai DA va CB cat nhau tai M .Tinh dien tich tam giac MAB

Cho hinh thang vuong ABCD co dien tich la 16 cm2.AB=1/3 CD. Keo dai DA va CB cat nhau tai M .Tinh dien tich tam giac MAB

cho hinh thang ABCD co dien tich la 29,34 m2 , day nho AB , day lon DC . biet chieu cao la 3.6m , day lon > day be 5 m.

a) tinh do dai moi day

b) neu keo day DA va CB cat nhau tai diem E , biet da bang 2/3 DE . Tinh dien tich EAB

thong cam nhe cac ban , nha minh chua cai unikey

mot dam ruong hinh thang co dien tich 1155m2 va co day be kem day lon 33m nguoi ta keo dai day be them 20m va keo dai day lon them 5m ve cung mot phia de duoc hinh thang moi dien tich hinh thang moi nay bang dien tich cua mot hinh chu nhat co chieu rong bang 30m va chieu dai 51m hay tinh day be day lon cua hinh thang ban dau

Cho hinh thang ABCD co day AB bang 8 cm,day CD gap 3 lan day AB va dien tich hinh thang ABCD la 320cm2.Keo dai canh DA ve phia A,cat canh CD tai phia N.

a.Tinh dien tich hinh tam giac ABC;BDA

b.Tinh do dai doan thang AN

mot hinh thang co day be bang 3/5 day lon va co chieu cao bang 23cm.Nguoi ta mo rong hinh thang bang cach keo dai day be cho bang day lon da duoc1 hinh chu nhat ,sau khi mo rong thi dien tich tang them 207cm vuong .Tinh dien tich hinh thang luc chua mo rong?

cho hinh thang abcd co do dai duong cao la 4,2 dm , dien tich bang 36,75 dmvuong va day lon cd hon day be ab la 7,5 dm. keo dai canh da ,bc cat nhau tai e . biet ad bang 3/5 de . dien tich tam giac abe la 

cho mot hinh thang abcd co dien tich la 252 cm2

day lon cd gap 2 lan day be ab tren cd lay diem m sao cho cm=1/2 md n la diem chinh giua bm keo dai dn cat bc tai i tinh chieu cao hinh thang abcd biet ab = 12cm so sanh bi va ic