注:" < "表示角.
1.the equation of a straight line, L, is 6x-2y+1=0.
a).the straight line P is parallel to L and passes through the origin
write down the equation of P.
2.give that A is (1,6),B is(9,2) C is(9,0)and D is(1,4) (本来有给一个图。大家自己画一下哈。)
a).the parallelogram is reflected in the line y=2.find the coordinates of the image of the point D
b).find the coordinates of the point about which ABCD has rotational symmetry of order 2
3.the co-ordinates of the points A,B snd C are (-7,1), (3,6) and (0,2) respectively
a), given that B is the the mid-point of the line AX, find the co-ordinates of X.
4.give that three points A(-2,7),B(-2,2)and C(6,-4)
a).find the value of sin<ABC (角ABC的正弦值)
5.the points A(-5,5),B(1,-3),and C(4,-3) are shown in the diagram
find
a)the equation of the line which passes through (0,3) and is parallel to AB
b)the value of cosine<ABC
是我在做题的过程中不会的题,没有地方问。只能上网来问。