Các câu hỏi tương tự
cho tam giac ABC.cac duong thang chua tia phan giac cua goc ngoai o dinh B va o dinh C cat nhau tai K.Tinh goc A biet goc BKC = 500
1.cho tam giac ABC co goc B-C=alpha phan giac AD
a) tinh gocADC,ADB theo alpha
b)Ve duong cao AH tinh goc HAD
2.chotam giac ABC,gocA =alpha,cac tia ohan giac cua B va C cat nhay tai I.Phan giac cat goc ngoai tai dinh B,C cat nhau tai K.Tia p/g goc B cat goc ngoai o dinh C.tinh cac goc BIC,BKC,BEC theo alpha.
Cho tam giac ABC co goc B>goc C duong thang chua tia phan giac goc ngoai dinh A cat duong thang BC o E.CM goc AEB=1/2.(goc B-goc C)
Cac ban co gang giup do. Neu co ai muon thay hinh anh cua minh thi len facbook nhan Le Dinh LUC
cho tam giac ABC co B=110 do C =50 do phan giac goc ngoai tai dinh A cat tia doi cua tia BC tai D tinh cac goc cua tam giac ABD
cho tam giac ABC co goc A=a . Cac tia phan giac cua goc B va C cat nhau tai I . Cac tia phan giac cua cac goc ngoai ding B va C cat nhau tai K. Tia phan giac cua g oc B cat tia phan giac ngoai ding C tai E. Tinh so do cua BKC, B . C theo a
Cho tam giac ABC co goc A khac goc B cac tia phan giac trong va ngoai cua goc C lan luot cat duong thang BA tai D va E tinh goc CED theo goc A va goc B cua tam giac ABC
hai tia phan giac trong tai dinh B va C cua tam giac ABC cat nhau tai O niet BOC bang 130 do
a) tinh so do goc A
b) hai tia phan giac ngoai tai dinh B va C cua tam giac ABC cat nhau tai P chung minh A.O,P thang hang
c) tam giac ABC la tam giac gi de OP la phan giac goc BOC
Hai duong thang xy va zt cat nhau tai O , biet goc XOT 4 lan goc XOZ . Tinh cac goc con lai : Bai 1ve goc xay 50 do . Ve goc xAy doi dinh xAya) Tinh cac goc con laib)Ve At la tia phan giac cua goc xAy , At la tia doi cua At . Chung to At la tia phan giac cua xAyc) Viet ten cac goc doi dinh : Bai 2Cho goc bet AOB . Tren cung mot nua mat phang bo AB , ta ve 2 tia OC va OD sao cho AOC BOD160 doa) so sanh goc BOC va AODb) goc OE la tia doi cua tia OD . Tia OB co la co phai la tia phan giac cua COE...
Đọc tiếp
Hai duong thang xy va zt cat nhau tai O , biet goc XOT= 4 lan goc XOZ . Tinh cac goc con lai : Bai 1
ve goc xay = 50 do . Ve goc x'Ay' doi dinh xAy
a) Tinh cac goc con lai
b)Ve At la tia phan giac cua goc xAy , At' la tia doi cua At . Chung to At' la tia phan giac cua x'Ay
c) Viet ten cac goc doi dinh : Bai 2
Cho goc bet AOB . Tren cung mot nua mat phang bo AB , ta ve 2 tia OC va OD sao cho AOC =BOD=160 do
a) so sanh goc BOC va AOD
b) goc OE la tia doi cua tia OD . Tia OB co la co phai la tia phan giac cua COE k ? Vi sao ?
Giup minh nha thanks giup de co qua
cho tam giac ABC vuong tai A , duong cao AH cac tia phan giac cua goc B va C cat nhau o I .phan giac goc AHB cai BI o K yia phan giac goc AHC cat CI o M CMR BI vuong goc voi AM