Các câu hỏi tương tự
CHO GOC NHON XOY TREN OY LAY DIOEM M TU M KE MN VUONG GOC VOI OX TAI N TU N KE NP VUONG GOC OY TAI P TU P KE PQ VUONG GOC TU Q KE OE VUONG GOC OY TRONG HINH VE CO BAO NHIEU CAP SONG SONG VI SAO BIET OQE = 40 DO TINH SO DO GOC NHON TRU XO
Cho 2 duong thang AB cat boi duong thang c tai A va B . Cho biet tong 2 goc trong cung phia bu nhau voi 1 goc sole trong voi 1 trong 2 goc nay bang 300 do va trong 2 goc ke bu co 1 goc nay gap doi goc kia . Hai duong thang A va B co song song voi nhau khong vi sao
cho goc xoy = 140 do , tren tia ox , lay diem a ve tia Az sao cho tia Az va tia oy nam tren cung 1 nua mat phang bo chua tia ox va goc oaz = 40 do . a) CMR Az song song oy b) ve tia Az' la tia doi cua tia Az . CMR 2 duong thang phan biet cua 2 goc xoy va goc oaz song song voi nhau
Cho ∆MPQ co goc PMQ=90°. Duong thang MH vuong goc voi PQ tai H. Tren duong vuong goc voi PQ tai P lay diem D ko cung nua mat phang bo PQ voi diem M sao cho MH=PD
Chung minh ∆ MHP=∆DPH
Hai duong thang MP va DH co song song ko? Tai sao?
Tinh goc MQP, biet goc PMH=30°
A=1/4/23-5/21-4/23+1,5+1/16/12
Cho tam giac ABC co B=45°,C=75°.phan giac BAC cat canh BC tai M. Qua M ke dg thang song song voi dg thang AB cat canh AC tai N
1, tinh so do goc BAC va goc AMB
2, tinh so do cac goc cua tam giac AMN
Ve hinh dum nha
cho goc xoy = 140 do , tren tia ox , lay diem a ve tia Az sao cho tia Az va tia oy nam tren cung 1 nua mat phang bo chua tia ox va goc oaz = 40 do .
a) CMR Az song song oy
b) ve tia Az' la tia doi cua tia Az . CMR 2 duong thang phan biet cua 2 goc xoy va goc oaz song song voi nhau
Bai 2:
a/Ve hinh theo cach dien dat sau
-Ve XOy=70do
-Ve diem A nam trong goc XOy
-Ve duong thang d1 di qua diem A va song song voi Ox
-Ve duong thang d2 di qua diem A va vuong goc voi Ox
Goi B la giao diem cua d1 va Oy
b/Hoi d1 va d2 co vuong goc voi nhau khong?Vi sao?
c/Tinh OAB?
cho tam giac ABC co goc ACB bang 60 do .a) ve tam giac ABC b) hai tia phan giac cua goc ABC va ACB cat nhau tai I . Qua I ve duong thang song song Bc , duong thang nay cat cac duong thang AB va AC tai D v E .Tinh so do goc ACI va goc CIEc) So sanh 2 goc DIB va ABI d) Qua A ke AH vuong goc voi BC tai H , qua C ke CK vuong goc voi DE tai K .Giai thic vi sao AH song song voi CK e) tinh so do goc CAHGIAI NHANH GIUM MINH NHA!!!MINH DANG CAN GAP ...
Đọc tiếp
cho tam giac ABC co goc ACB bang 60 do .
a) ve tam giac ABC
b) hai tia phan giac cua goc ABC va ACB cat nhau tai I . Qua I ve duong thang song song Bc , duong thang nay cat cac duong thang AB va AC tai D v E .Tinh so do goc ACI va goc CIE
c) So sanh 2 goc DIB va ABI
d) Qua A ke AH vuong goc voi BC tai H , qua C ke CK vuong goc voi DE tai K .Giai thic vi sao AH song song voi CK
e) tinh so do goc CAH
GIAI NHANH GIUM MINH NHA!!!MINH DANG CAN GAP ...
1 cho tam giac abc can a , goc a bang 40 do lay d khac phia b so voi ac thoa man goc cad bang 60 do goc cad bang 80 do chung minh bd vuong goc voi ac2 cho tam giac abc vuong can a . d la diem bat ki tren ab. tren nua mat phang bo ab tu c ve tia bx sao cho goc abx bang 135 do. duong thang vuong goc voi dc ve tu d cat bx o e . chung minh tam giac dec vuong can3 cho tam giac abc can b goc abc bang 80 do , i la diem trong tam giac sao cho goc iac bang 10 do, ica bang 30 do tinh goc abi4 cho tam gia...
Đọc tiếp
1 cho tam giac abc can a , goc a bang 40 do lay d khac phia b so voi ac thoa man goc cad bang 60 do goc cad bang 80 do chung minh bd vuong goc voi ac
2 cho tam giac abc vuong can a . d la diem bat ki tren ab. tren nua mat phang bo ab tu c ve tia bx sao cho goc abx bang 135 do. duong thang vuong goc voi dc ve tu d cat bx o e . chung minh tam giac dec vuong can
3 cho tam giac abc can b goc abc bang 80 do , i la diem trong tam giac sao cho goc iac bang 10 do, ica bang 30 do tinh goc abi
4 cho tam giac abc can a co goc a bang 100 do , bc =a, ac =b ve phia ngoai tam giac abc ve tam giac abd can d co goc adb bang 140 do tinh ch vi tam giac adb theo a,b
ve hinh gium minh voi , xin mn day