trong mat phang toa do ve tam giac ABC voi cac dinh A(3;5);B(3;-1);C(-5;-1). tam giac ABC la tam giac gi ?
a)xac dinh cac diem A(0;3),B thuoc 0;3);C(5;0) tren mat phang toa do
b)tinh dien tich tam giac ABC
ho tam giac abc . Tren nua mat phang co bo la duong thang AC chua diem B ve tia AD//BC .Tren nua mat phang doi voi nua tren ve tia AE//BC.Tren nua mat phang doi voi nua tren ve tia AE//BC a cmr 3 diem A,D,E thang hang ,b Tinh tong cac goc trong cua tam giac?
trong mat phang toa do oxy lay cac diem A(5,4),B(2,3),C(6,1). hay tinh cac goc cua tam giac abc
a, Tren mat phang toa do ve tam giac ABC co A(1;2) ; B(1;-3) C(4;-3)
b, Tinh chu vi tam giac ABC
Bai 1;
Ve tren mat phang toa do Oxy cac diem A;B va C.Tinh dien tich cua tam giac ABC biet :
+Diem A co toa do A(x0;y0) ma x0 +1 =0 va y0-2=0
+diem B co toa do B(x1;y1) ma (x1-2)^2+(y1+3)^2=0
+Diem C co toa do C(x2;y2) ma /x2-4/+can y2-3=0
gggggggggggggggggggggggggggggggggggggggggggggggggg
a, Tren mat phang toa do ve tam giac ABC co A(1;2) ; B(1;-3) C(4;-3)
b, Tinh chu vi tam giac ABC
Giup toooooooooooooooooooooooooo!!!!!!!!!!!!!!!!!!!!!!!!!!!!Gấp gấp gấppppppppppppppppppppppppppppppp
Đồng hồ cát 3779 là bn à mk là Thiên Thảo trên Hocj24.VN nè
Cac anh cac chi oi giup em voi, gap lam.Cho ham so y=x+1 co do thi la (d) va ham so y= -x+3 co do thi la (d' )
a) Ve (d) va (d' ) tren cung mot mat phang toa do
b) Hai duong thang (d) va (d' ) cat nhau tai C va cat truc Ox theo thu tu tai A va B tim toa do cac diem A,B,C (Tim toa do diem C bang phuong phap dai so)
c) tinh chu vi va dien tich tam giac ABC (voi don vi do tren cac truc toa do la cm)
d) tinh goc tao boi duong thang y=x+1 voi truc Ox
Cam on nhieu.
xet ham so y=mx+2-m (1) a) ve do thi cua ham so ung voi m=-2;m=3 tren 1 mat phang toa do. tim toa do giao diem cua 2 do thi. b) chung minh rang khi m lay cac gia tri khac nhau thi do thi cua ham so (1) van luon di qua 1 diem co dinh thuoc paraboly=2x^2
xet ham so y=mx+2-m (1)
a) ve do thi cua ham so ung voi m=-2;m=3 tren 1 mat phang toa do. tim toa do giao diem cua 2 do thi.
b) chung minh rang khi m lay cac gia tri khac nhau thi do thi cua ham so (1) van luon di qua 1 diem co dinh thuoc paraboly=2x^2