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cho tam giac abc neu keo dai day canh day bc mot doan cd sao cho cd = 1/3 bc thi dien tich tang them 37,5 cm2 tinh dien tich tam giac abc
cho tam giac abc neu keo dai canh day bc mot doan cd sao cho cd = 1/3 bc thi dien tich tang them 37,5 cm2 tinh dien tich tam giac abc
cho hinh tam giac bc = 28m neu keo dai day bc ve phia c them mot doan cd = 7m thi dien tich tang them 84m2 tinh dien tich hinh tam giac abc?
cho tam giac ABC. Keo dai canh BC doan CM= 5,5cm thi dien tich tam giac tang them . Tinh dien tich tam giac ABC, biet day BC=17,2cm. Tren AB lay diem N sao cho BN= 1/4 AB.Tinh dien tich tu giac AMCN
Cho hinh tam giac ABC co day BC dai 2cm.Nguoi ta keo dai day BC ve phia C them mot doan CD thi dien tich tam giac ABD= 3/2 dien tich tam giac ABC. Tinh do dai CD
Cho hinh tam giac ABC canh BC=24cm.Neu keo dai doan bc them 5 cm thi dien tich tam giac tang them 20cm vuong. tinh dien tich hinhf tam giac ABC.[Ve hinh minh hoa]
cho tam giac abc co day bc bang 5,29 cm chieu cao ah bang 3 cm tinh dien tich tam giac abc
keo dai day bc mot doan cd bang 2,3 cm dien tich tang them chiem bao nhieu phan tram dien tich tam giac abc
Cho tam giac ABC . Keo dai canh day BC ve phia C mot d9an thang dai 5, 2 cm thi dien tich tang them 65cm vuong . Biet d8en tich tam giac ABC luc dau la 187, 5m vuong . Tinh canh day BC luc dau
tam giac ABC co dien tich 559 cm vuong,canh day BC co do dai la 43 cm,Hoi neu keo dai canh BC them 7 cm thi duoc mot tam giac moi co dien tich hon dien tich tam giac ABC la bao nhieu ?