Các câu hỏi tương tự
cho tam giac ABC vuong tai A co BC=a AC=b AB=c
tim GTNN cua M = 8a^2(1/b^2 +1/c^2) + (b+c)/a +2016
Cho tam giac ABC co AB = 6 cm, AC = 4,5cm, BC = 7,5cm
a. Chung minh tam giac ABC vuong tai A. Tinh cac goc B, goc C va duong cao AH cua tam giac.
b. Tim tap hop cac diem M sao cho S(ABC) = S(BMC).
Cac ban giup mk vs nha mk dag can gap a.
Cam on mn nha.😝😝
tim tat ca cac canh va goc chua biet cua tam giac vuong do, cho tam giac abc vuong tai a co: b) BC=12, goc B= 35 do.
c) AC=4, goc C=42 do,
d) AB=15, BC=25
e) AB=6, goc C= 60 do
cho tam giac nhon ABC(AB<AC) cua duong tron(0) tiep tuyen b va c cat nhau tai n
a,CM ON VUONG GOC BC
b,TIEP TUYEN A CUA DUONG TRON (O) CAT TIA NB TAI M CM MN = MA + MC
c,KE DUONG CAO BP CUA TAM GIAC ABC CM AP. BN = CP BM
HỘ MÌNH Ý c, VS
Cho tam giac ABC vuong tai C,trong do AC= 0,9m, BC= 1,2. Tinh cac ti so luong giac cua goc B, tu do suy ra cac ti so luong giac cua goc A.
Cac bn giup mk vs nha👍👍
Cho tam giac ABC vuong tai A, duong cao AH ( H thuoc BC) va phan giac BE cua ABC ( E thuoc AC), AH va BE cat nhau tai I. CM:
a) IH.AB = IA.BH
b) Tam giac BHA dong dang voi tam giac BAC va AB2 = BH.BC
c) IH/IA = AE/EC
cho tam giac ABC vuong tai A, duong phan giac trong cua goc B va gocC cat nhau tai I. Duong thang di qua C vuong goc voi BI cat AB tai D. cho AB=5, IC= can bac hai cua 6, TINH BC
Bai 1 giai tam giac ABC vuong tai A, bieta/ AB 6cm, ˆBB^ 40b/ AB 10cm, ˆCC^ 35c/BC32cm, AC 20cmd/ AB 18cm, AC21cmBai 2 Cho △ABC co AB40cm , AC58cm , BC42cma/ △ ABC co phai la tam giac vuong hay k ? vi sao ?b/ Ke duong cao BH cua tam giac . Tinh do dai BH ?c/ Tinh ti so luong giac cua goc ABai 3 : Cho △ABC co AB5cm , ˆBB^ 60 , ˆAA^ 45a/ tinh do dai BC va ACb/ Tinh dien tich △ABC
Đọc tiếp
Bai 1 giai tam giac ABC vuong tai A, biet
a/ AB = 6cm, ˆBB^ = 40
b/ AB= 10cm, ˆCC^ = 35
c/BC=32cm, AC = 20cm
d/ AB = 18cm, AC=21cm
Bai 2 Cho △ABC co AB=40cm , AC=58cm , BC=42cm
a/ △ ABC co phai la tam giac vuong hay k ? vi sao ?
b/ Ke duong cao BH cua tam giac . Tinh do dai BH ?
c/ Tinh ti so luong giac cua goc A
Bai 3 : Cho △ABC co AB=5cm , ˆBB^ =60 , ˆAA^ = 45
a/ tinh do dai BC va AC
b/ Tinh dien tich △ABC
bai 1:Cho duong tron tam O, day AB. cac tiep tuyen ke tu A,B cat nhau tai C. ke day CD cua duong tron co duong kinh OC(D khac A,B). CD cat cung nho AB cua (O) tai E (E nam giua C va D).Chung minh:
a/goc BED= goc DAE
b/DE^2=DA*BD
bai 2:Cho tam giac ABC deu noi tiep duong tron tam O. M la diem nam tren cung nho AB. chung minh:
a/MB+MA=MA
b/ke MH vuong goc voi BC, MI vuong goc voi AB, MK vuong goc voi AC. chung minh 3 diem H,I,K thang hang