help me pls cac pro layzer
pls pls pls
help me pls cac pro layzer
pls pls pls
Ve mot tam giac ABC, biet ba canh BC = 4cm, AB = 3cm. AC =2cm.
-Ve doan thang BC = 4cm.
-Ve cung tron tam B, ban kinh 3cm.
-Ve cung tron tam C, ban kinh 2cm.
-Lay mot giao diem cua hai cung tren, goi giao diem do la A.
-Ve doan thang AB,AC, ta co ABC
ve(A;3cm) ve M thuoc (A;3cm) ve N khong thuoc (A;3cm) so sanh AN va AM
bai 2:ve(O;3cm) ve OA=5cm cat duong tron tam o tai B ve (B;2cm)
a)cho biet vi tri diem O,diem A doi voi (B;2cm)
b)duong tron(B;2cm) catOB tai M. chung to M la trung diem cua OB
Cho 10 diem thuoc duong thang a va 5 diem khong thang hang, nam ngoai duong thang a. Qua 2 diem thi ve mot duong thang .Hoi co the ve duoc bao nhieu duong thang phan biet ? ( Co ve hinh )
Ai nhanh mình tik và kết bạn.Cảm ơn rất nhiều
Ve tam giac ABC biet AB = 3cm,AC= 4cm,BC=5cm.Lay trung diem i cua doan thang BC.Ve duong tron tam i ban kinh 2,5cm
cho goc bet xoy ve tia oy sao cho xy = 5/4 yoz
a, tinh xoy va yoz
b ke tia ot sao cho toy = 80 do tia oy co la tia phan giac cua toz ko vi sao
c , qua o ke them 20 duong thang nua sao cho cac duong thang nay deu ko chua cac tia ox,oy,oz ve duong tron tam o ban kinh r goi a la tap hop cac giao diem cua duong tron noi tren voi cac goc co o trong hinh ve .tinh so tam giac ma cac dinh cua no deu thuoc tap hop a
cho goc bet xoy ve tia oy sao cho xoy = 5/4 yoz
a, tinh xoy va yoz
b, ke tia ot sao cho toy = 80 do tia oy co la tia phan giac cua toz ko? vi sao ?
c , qua o ke them 20 guong thang nua sao cho cac duong thang nay deu ko chua cac tia ox,oy,oz ve duong tron tam o ban kinh r goi a la tap hop cac giao diem cua duong tron noi tren voi cac goc o co trong hinh ve tinh so tam giac ma cac dinh cua no deu thuoc tap hop a
cho đường tròn tâm o bán kính r =4cm va doan thang OA=5cm . chung to diem A nam ben ngoai duong tron (O;4cm)
cho goc bet xoy ve tia oy sao cho xy = 5/4 yoz
a, tinh xoy va yoz
b ke tia ot sao cho toy = 80 do tia oy co la tia phan giac cua toz ko vi sao
c , qua o ke them 20 guong thang nua sao cho cac duong thang nay deu ko chua cac tia ox,oy,oz ve duong tron tam o ban kinh r goi a la tap hop cac giao diem cua duong tron noi tren voi cac goc o co trong hinh ve tinh so tam giac ma cac dinh cua no deu thuoc tap hop a
mai nop roi
mong giai gium
giot toan
Cho truoc 10 diem trong do khong co 3 diem nao thang hang.
a) Hoi ve duoc bao nhieu duong thang?
b) Neu thay 10 diem bang n diem (n thuoc N, n > 2) thi ve duoc bao nhieu duong thang?