so duong bthang tao thanh tu 8 diem phan biet doi mot khong thang hang la
so duong thang tao thanh tu 8 diem phan biet doi mot khong thang hang
Cho truoc mot so duong thang phan biet khong co 3 diem nao thang hang. So duong thang tao thanh tu cac diem do la 36, tinh so diem ?
so duong thang tao thanh tu 10 diem phan biet trong do khong co 3 diem nao thang hang
So duong thang tao thanh từ 5 diem phan biet trong do khong co 3 diem nao thang hang la bao nhiêu?
1. Tren 1 duong thang xy lay 4 diem phan biet A,B,C,D hay chi ra cac tia doi nhau
2. cho 10 diem trong do khong co ba diem thang hang . Cu qua hai diem ta ve duoc 1 duong thang . Hoi co tat ca bao nhieu duong thang?
3. cho n diem trong do khong co ba diem nao thang hang . Cu qua hai diem trong so cac diem do ve duoc 1 duong thang. Biet rang co 435 duong thang tao thanh .Tim n?
so duong thang duoc tao thanh tu 10 diem trong do co 3 diem thang hang la
cho 5 diem phan biet va khong co 3 duong thang nao thang hang.Noi cac diem voi nhau de tao thanh duong thang.Co bao nhieu duong thang
cho 10 duong thang phan biet doi 1 cat nhau trong do khong co 3 duong thang .Hoi co bao nhieu giao diem tao thnh rut ra ket luan