biet ab=7, ac=5 , bc=35. Tich abc
biet ab=7;ac=5;bc=35 . tich abc=...........
abacbc=7.5.35
(abc)2=1255
(abc)2=352 hoặc (-35)2
abc=35 hoặc -35
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 tren AB lay diem M sao cho AM bang 1/3 AB tren AC lay diem N sao cho AN bang 2/3 AC tren BC lay diem E sao cho BE bang 1/3 BC biet dien tich tam giac MNE la 18 cm Tinh dien tich tam giac ABC
CHO TAM GIAC ABD, CO AC =AB.TREN AB LAY M SAO CHO AM = 1\3 AB.TREN AC LAY E SAO CHO CE=2/3 CA.TREN BC LAY K SAO CHO BK=KCX2.
a.TINH DIEN TICH MEKB , BIET DIEN TICH ABC=18cm2
b.TINH BC,BIET EM =3cm
giup minh nha,minh can gap lam!
Cho tam giac ABC. Mot duong thang song song voi BC cat cac canh AB, AC theo thu tu o D va E. Goi G la mot diem thuoc canh BC. Tinh dien tich tu giac ADGE biet dien tich tam giac ABC bang 16cm, dien tich tam giac ADE bang 9 cm
Cho tam giac ABC. Mot duong thang song song voi BC cat cac canh AB, AC theo thu tu o D va E. Goi G la mot diem thuoc canh BC. Tinh dien tich tu giac ADGE biet dien tich tam giac ABC bang 16cm, dien tich tam giac ADE bang 9 cm
Tim cac so nguen a,b,c Biet:
ab =-35
bc = -7
abc=35
Cho tam giac ABC. M la trung diem cua cach BC .Tren AC lay diem N sao cho AN =1/4 AC tai diem . Noi diem MN keo dai cat canh AB tai diem Q . Noi Q voi C . Cho biet dien tich AQN =10 . Tinh dien tich ABC
ab=7 ; ac=5 ; bc=35 (a;b;c<0)
Khi đó abc=...
Vì ab=7 ; ac=5 ; bc=35
=> ab . ac . bc = 7.5.35
<=> (abc)2=1225
<=>(abc)2=(+- 35 )2
<=> abc=+-35
Vậy abc= {35;-35}