cho tam giac ABC. tren canh ab lay diem m ,tren canh ac lay diem n sao cho am = 1/3ab, nc =2/3 ac.dien tich tam giac abc gap dien tich tam giac amn bao nhieu lan

cho tam giac abc tren canh ab lay diem M sao cho AM=3/4 AB tren canh AC lay N sao cho AN = 3/4 AC noi M voi N. Tim ti so dien tich hinh tam giac AMN va tam giac ABC

cho tam giac abc tren canh ab lay diem m,tren canh ac lay diem n so cho am bang 1/3 ab,nc=2/3 ac.hoi dien tich tam giac abc gap may lan tam giac amn

cho tam giac ABC tren canh AB  lay diem M tren canh AC lay diem N sao cho AM=1/3AB NC=2/3AC dien tich tam giac ABC gap dien tich AMN so kan la

Cho tam giac ABC . Tren canh AB lay diem M , tren canh AC lay diem N sao cho AM = \(\frac{1}{3}\)AB , NC = \(\frac{2}{3}\)AC . Dien tich tam giac ABC gap may lan dien tich tam giac AMN ?

cho tam giac ABC lay diem M tren canh AB sao cho AM=1/3 AB lay diem N tren canh AC sao cho AN = 2/3 AC tren canh BC lay diem P sao cho CP=1/3 BC tinh dien tich tu giac BMNP biet dien tich tam giac ABC la 108 cm2

Cho tam giac ABC co dien tich la 300 cm vuong.Tren canh AB lay diem M sao cho AM = MB , tren canh AC lay diem N sao cho NA = NC . Tinh dien tich tam giac AMN.

cho hinh tam giac ABC co gocA la goc vuong va canh AB=6 cm,canh AC = 9 cm tren canh AB lay diem M va N sao cho AM=MN=NB,tren canhAC lay diem K va H sao cho AK=KH=KC.tinh dien tich hinh tu giac MNHK

cho hinh tam giac ABC co AB =20 cm, AC = 25 cm. tren canh AB lay diem D cach A la 15 cm ; tren canh AC lay diem E cach A la 20 cm . noi D voi E duoc hinh tam giac ADE co dien tich la 45 cm vuong. tinh dien tich hinh tam giac ABC