Các câu hỏi tương tự
cho tam giac ABC can tai A duong cao AH biet AB=5cm,BC=6cm.
a)tinh do dai cac doan thang BH,AH
b)Goi Gla trong tam cua tam giac ABC . Chung minh rang ba diem A,G,H thang hang.
c)Chung minh hai goc ABG va ACG bang nhau
Tam giac ABC can tai A ,A nhon , A la tia phan giac cua BAC cat BC tai H a; c/m tam giac ABH=tam giac ACH b; Ve trung tuyen BD cua tam giac ABC cat AH tai G c/m G la trong tam cua tam giac ABC c;AB=15cm ,BH=9cm , tinh AG d;Qua H ve duong thang song song voiAC cat AB tai E c/m C,G,E thang hang
Giai giup em di mai nop bai roi
cho tam giac ABC can tai A duong cao AH
biet AB=5cm BC=6cm
A) tinh do dai doan thang BH,AH?
B) goi G la trong tam tam giac ABC chung minh 3 diem AGH thang hang
C) chung minh goc ABG=goc ACG
Cho tam giac ABC n tai A co duong cao AH
a/ Chung minh tam giac ABH = tam giac ACH va AH la tia phan giac cua goc BAC
b/ Cho BH = 8 cm ; AB = 10 cm . Tinh AH
c/ Goi E la trung diem cua AC va G la giao diem cua BE va AH . Tinh HG
d/ Ve Hx song song voi AC, Hx cat AB tai E . Chung minh C,G,E thang hang
( giup minh voi nhe THANH YOU )
Cho tam giac ABC can tai A co AD la duong trung tuyen
a)Chung minh tam giac ABD= tam gaic ACD va AD vuong goc voi BC
b)Cho AB=10cm,BC=16cm. Tinh do dai AD va so sanh cac goc cua tam giac ABC.
c) Ve duong trung tuyen CF cua tam giac ABC cat AD tai M. Tinh do dai AM.
d) Ve DH vuong goc AC tai H, tren canh AC va canh DC lan luot lay hai diem E,K sao cho AE=AD va DK=DH. Chung minh: EK vuong goc voi BC
bai 8:Cho tam giac ABC vuong tai A
1, Cho AB =6cm, BC =10cm. Tinh do dai doan thang AC
2, Ke Bd la tia phan giac cua goc B, I la giao diem cua AB va ED
a, Chung minh: tam giac ABD =tam iac EBD
b, Chung minh Bd la duong trung truc cua doan thang AE
c, Chung minh tam giac DIC can
d, Chung minh AE//IC
e, Neu ACB=30 thi tam giac ACI la tam giac gi? Vi sao
1. cho tam giac ABC can tai A, ve diem M, Nbat ki tren duong trung truc ca doan thang BC.CM:a,tam giac MBCcan tai Mb, MNCMNB2.cho tam giac ABC cao M la trung diem cua canh BC. qua B ke duong thang Bx AC, qua C ke Cy AB. giao diem cua Cy, Bx la D. CM: A, D, M thang hang.3. do dai 2 canh goc vuong cua mot tam giac vuong ti le voi 7 va 24. chu vi tam giac bang 112. tinh do dai canh huyen.4.cho tam giac ABC can tai A, canh day nho hon canh ben. duong trung truc cua AC cat BC tai M. tren tia doi cu...
Đọc tiếp
1. cho tam giac ABC can tai A, ve diem M, Nbat ki tren duong trung truc ca doan thang BC.CM:
a,tam giac MBCcan tai M
b, MNC=MNB
2.cho tam giac ABC cao M la trung diem cua canh BC. qua B ke duong thang Bx \\ AC, qua C ke Cy \\ AB. giao diem cua Cy, Bx la D. CM: A, D, M thang hang.
3. do dai 2 canh goc vuong cua mot tam giac vuong ti le voi 7 va 24. chu vi tam giac bang 112. tinh do dai canh huyen.
4.cho tam giac ABC can tai A, canh day nho hon canh ben. duong trung truc cua AC cat BC tai M. tren tia doi cua AM lay N \ AN = BM.
a, CM: 2 goc AMC va BAC bang nhau
b, CM: CM = CN
c, de CM vuong voi CN hi tam giac ABC phai co them dieu kien gi?
5. cho tam giac ABC deu. tren tia doi cua tia phan giac goc BAC lay D \ AD = AB. tinh cac goc cua tam giac DBC.
7 tháng 4 2022 lúc 21:49
Cho tam giac ABC can tai A ,ve tia phan giac AH,biet AB=15cm ,BH=9cm.
a:Cm tam giac ABH=tam giac ACH
b: Ve trung tuyen BD cat AH tai G.Cm:G la trong tâm cua tam giac ABC.Tinh AG
cho tam giac ABC vuong tai A duong phan giac BE ke EH vuong goc voi BC tai H goi K la giao diem cua 2 duong thang BA va HE
a, chung minh AE bang HE,AB bang HB
b, chungminh tam giac BCK la tam giac can
c, tinh do dai BK , AC biet AB bang 6cm ,BC bang 10cm