cho tam gia ABC duong cao AD.tren AD lay diem M sao cho AM gap doi MD.Biet BD=5cm ,DC 15cm .hay so sanh dien tich tam giac ABM va BMC
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cho tam giac ABC,duong cao AH.Tren AH lay diem D sao cho AD gap doi DH.Biet BH=4cm,BC=12 cm.Hay so sanh dien tich tam giac BCD voi dien tich tam giac ABH.
cho tam giac ABC,tren canh AB lay diem D sao cho AD gap doi DB , tren canh AC lay diem E sao cho AE gap doi EC . Noi B voi E , C voi D , doan BE cat CD o G . Hay so sanh dien tich tam giac GEC va DGB
Cho tam giac ABC .Tren canh AB lay diem D sao cho AD gap doi BD .Tren canh AD lay lay diem E sao choAE gap doi EC .Noi B voi E , C voi D ,doan BE cat CD o G . So Sanh dien tich tam giac GDB voi diwn tich tam giac
Cho tam giac ABC . Tren AB lay diem D sao cho AD gap doi DB . Tren AC lay diem E sao cho AE gap doi EC . Noi B voi E, C voi d , doan BE cat CD tai G . So sanh dien tich hinh GBD va dien tich hinh GEC
CHO TAM GIAC ABC . TREN AB LAY DIEM M SAO CHO AM = 2/3 MB . N TREN AC SAO CHO NA = NC .
A. SO SANH DIEN TICH AMC VA DIEN TICH BMC ?
B. SO SANH DIEN TICH BNC VA DIEN TICH BMC ?
Sr nãy giờ quên mất câu này
A.
Ta có diện tích AMC < diện tích BMC vì AM < BM (gt)
B.
Ta có diện tích BNC < diện tích BMC vì NC < BM
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cho tam giac abc lay m la diem diem chinh giua bc
a,so sanh dien tich tam giac abm va dien tich tam giac acm
b,so sanh dien tich tam giac abm va dien tich tam giac abc
lam giup minh nhe
a) M điểm giữa của BC nên CM = MB
Tam giác ABM và tam giác ACM có : đáy CM = MB, chung đường cao tương ứng với đáy.
Nên S(ABM) = S(ACM)
b) S(ABC) = S(ABM) + S(ACM) mà S(ABM) = S(ACM)
Nên \(S\left(ABM\right)=\frac{1}{2}S\left(ABC\right)\)
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1/2 1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000% luob
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1/2 dung 100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000% luon minh the
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cho hinh tam giac abc tren canh ab lay diêm sao cho ae gap doi eb tren canh ac lay diem d sao cho ad bang 1/2 dc noi dc va ce cat nhau tai g hay tinh dien tich hinh tam giac bgc biet dt hinh tam giac bge la 10cm
cho tam giac ABC .Tren canh BC lay diem D sao cho BD gap doi CD .NOi A voi D, lay E lam bat ki tren AD noi voi E,B,C.Hay so sanh dien tich 2 hinhb tam giac BAE va CAE
CAC BAN LAM ON GIUP MINH!
cho tam giác abc co duong cao ah .tren ah lay diem d sao cho ad gap doi hd .biet bh =4cm .bc=12cm .so sanh dien tch bcd va abh