Các câu hỏi tương tự
ve hinh theo cach dien dat sau:
a,ve hai duong thanh phan biet kong song song a va b
lay hai diem A va B sao cho A thuoc a, B thuoc b
c, ve duong thang c di qua B sao cho c vuong goc voi a
d, ve duong thang c di qua A sao cho d song song voi b
cho duong thanh d va diem O thuoc d. ve duong thang d' di qua o va vuong goc voi d. noi ro cach ve va cach su dung cong cu
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 truoc diem a va duong thang d di qua diem a ve 2018 duong thang phan biet . goi x la so duong thang vuong goc voi d, y la so duong thang khong vuong goc void trong 2018 duong thang da cho..
Tim gia tri nguyen lon nhat cua x, y
Tim gia tri nguyen nho nhat cua x,y
cho duong thnag d va diem O thuoc d.Chi su dung eke ,hay ve duong thang dd' di qua O va vuong goc voi d.Noi ro cach ve
Cho biet tu diem A thuoc tia phan giac cua goc xoy co mu nha! ve duong thang song song voi Ox cat Oy tai B va ve duong thang song song voi Oy tai C a)chung minh BOA=AOC ,b) chung minh AO la tia phan giac cua BAC
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 tam giac ABC vuong tai A co AB=5cm,BC=10cm
a, Tinh do dai AC
b, ve duong pg BD cua tam giac ABD va goi E la hinh chieu cua D tren BC. Chung minh tam giac ABC=EBD va AE vuong goc voi BD
c, goi giao diem cua 2 duong thang ED va BA la F. chung minh tam giac ABC=AFC
d, Qua A ve duong thang // voi BC cat CF tai G. chung minh 3 diem B,D,G thang hang
Cho goc xOy nhon , tu diem A thuoc tia phan giac cua goc xOy , ve duong thang song song voi Ox cat Oy o B
a , Tim tren hinh ve hai goc so le trong
b. CMR : goc BOA = goc BAO
Ai nhanh va dung nhat mik se tick!