Các câu hỏi tương tự
Cho tam giac ABC can tai A co truc tam H nam ben trong tam giac. Biet HA = 3,094, HB = 6,630. Tinh do dai duong cao AD cua tam giac ABC.
CHO TAM GIAC ABC VUONG CAN TAI A . TRONG TAM GIAC ABC LAY DIEM E SAO CHO GOC EAC =ECA =15 DO .
TINH SO DO GOC ABE
cho tam giac ABC vuong tai A , goc C =15 do tren tia BA lay O sao cho BO=2AC . chung minh rang tam giac OBC can
Cho tam giac ABC can tai A. Tren canh BC lay hai diem M va N cac duong thang AM va AN cat duong tron tam O ngoai tiep tam giac ABC theo thu tu tai E vaF .CM: TU GIAC MNFE NOI TIEP
cho tam giac abc can tai a duong cao ah =10 bk=12. bc?
Cho tam giac abc can tai a , dg cao ah,bk cmr bc.bc=2ck.ac
cho tam giac ABC can tai A co BC =24, AC=20
Cac duong cao ha tu A va B cua tam giac ABC cat nhau tai H(goc C khac 90°) va cat duong tron ngoai tiep tam giac ABC lan luot tai D va E.chung minh rang:
A)CD = CE
B)TAM GIAC BHD CAN
cho tam giac abc can tai a. canh ab,bc,ac tiep xuc voi duong tron tam o tai cac dem d,e,f. bf cat (o) tai i, di cat bc tai m. chung minh:
a)tam giac def co 3 goc nhon
b)df // bc
c)tu giac bdfc noi tiep
d)bd/cb =bm/cf