Tren duong thang d lay theo thu tu cac diem A1, A2, A3... A2000 va 1 diem B nam ngoai duong thang d. Co bao nhieu tam giac ma 3 dinh la cac diem noi B voi A1, A2, A3... A2000 ( giup voi, sao hong ai giup tui vay, help)
Tren doan thang BM lay them 2014 diem khac voi 3 diem B,C,M.
c Ta noi A voi cac diem da cho tren doan BM.Hay tinh so tam giac tao thanh
Tren duong thang x,y lay o.Lay diem a thuoc tia ox,B thuoc tia oy sao cho OA=2cm;OB=2oa
A)Tinh do dai doan AB?
B)Goi Yla trung diem cua OB.Chung minh O la trung diem cua doan thang AI
C) Tren duong thang xy lay 100 diem diem phan biet(khac O,A,B,I).Noi 2 diem ta duoc mot doan thang.Hoi co bao nhieu duong thang tao thanh?
giup minh voi! HELP ME!!!!!
cho doan thang AB=1m .lau A1 la trung diem cua doan thang AB,A2 la trung diem cua AA1,A3 la trung diem cua AA2.... cu tiep tuc nhu vay cho den A20 la trung diem cua AA19.tinh AA1+AA2+AA3+............+AA20
tren mot duong thang song song lay n diem a1,a2,a3,....an .qua cac diem nay ve cac duong thang song song voi nhau .tinh gia tri cua n de trong hinh co dung 100 tia
cho hai tia Hx va Hy , Tren cac tia Hx , Hy lan luot lay cac diem B,C sao cho HB bang 6cm;HCbang 4cm. Goi M ,N la trung diem cua thu tu HB,HC
a, tinh do dai doan MN
b, lay diem A khong thang hang voi B,C roi noi A voi H,B,C,M,N. Hay ve hinh va ghi ten cac doan thang co trong hinh ve0
tren duong thang xy , lay cac diem A,B,C , theo thu tu do, sao cho AB=6cm , AC= 8cm
a/ Tinh do dai doan thang BC
b.goi M la trung diem cua doan thang AB .Hay so sanh MBva AC
tinh tong 2011 cac so tu nhien le dau tien
tren duong thang d lay 2012 diem phan biet
tinh so doan thang tren duong thang d duoc tao thanh tu 2012 cac diem do
cho 100 doan thang A1 ,A2 ,A3 ....... ,A100trong do khong co ba diem nao thang hang .Goi S la tong cac doan thang nhan 2 diem trong cac diem do lam dau mut . So sanh Sva 5000