If the coordinates of the points P,Q are x1,y1 , x2,y2 , then the coordinates of the point in the l

x1+x22,y1+y22) "The coordinates of points a, b, and c are known to be (-5,0), (3,0), and (1,4) respectively, and the coordinates of the midpoints d and e of the line segments ac and bc are used to find the coordinates of d and e, and to judge the position relationship between de and ab Test point: coordinates and graphic properties Topic: Calculation questions Analysis:

It is known that the coordinates of points a, b, and c are (-5,0), (3,0), and (1,4) respectively, and the coordinates of d are (-3,2), and the coordinates of e are (2,2), according to which this question can be answered Answer: Solution: From the "midpoint formula" and the coordinates of points a, b, and c (-5,0), (3,0), (1,4), d(-2,2), e(2,2), the ordinates of points d and e are equal, de x axis, and the straight line ab is on the x axis, de ab Comments:

This question examines the nature of coordinates and figures, which is a basic question, and the key is to grasp that when the ordinates of two points are equal, the straight lines in which they are located are parallel

If the coordinates of the points p and q are (x1,y1) and (x2,y2), then the sitting and trembling macro of the midpoint of the line segment pq is marked as (

x1+x2y1+y2

Summary. 2x=x-1

x=-1p(

Knowing that the coordinates of the point p are (2x,x+3), the coordinates of the point m are (x-1,2x), and the pm is parallel to the y-axis, then the point p is of the point.

2x=x-1x=-1p(

Wang Changjiang bought 5 bottles of juice and 9 small bottles of juice, a total of 6,600 ml, and each large bottle contained more juice than the small bottle.

I hope it will help you, if you don't know anything, you can consult the teacher Oh By the way, move Lao Min or move your little hand to give the teacher a thumbs up, thank you

(1) The coordinates of the midpoint d,e of the line segment AC,BC: xd=(-5+1) 2=-2, yd=(0+4) 2=2, point d(-2,2)xe=(3+1) 2=2, ye=(0+4) 2=2, point e(2,2).

2) Draw the graph in the sub-coordinate system and judge the relationship between the number and position of the line segment de and the edge ab.

de ab, and de=2-(-2)=4, ab=3-(-5)=8, ab=2de.

If the coordinates of the points P and Q are (X1, Y1) and (X2, Y2), then the coordinates of the midpoint of the line segment Pq are (,) and the coordinates of the known points A, B and C are (-5,0), (3,0) and (1,4) respectively

Knowing that the coordinates of points a, b, and c are respectively (-5,0), (3,0), (1,4), the coordinates of d can be obtained as (-2,2), and the coordinates of e (2,2), according to which this question can be answered: Solution: From the "midpoint formula" and the coordinates of points a, b, and c (-5,0), (3,0), (1,4), d(-2,2), e(2,2), the ordinates of the line de are equal, de x-axis, and the straight line ab is on the x-axis, de ab

1) The coordinates of the midpoint d,e of the line segment AC,BC: xd=(-5+1) 2=-2, yd=(0+4) 2=2, point d(-2,2)xe=(3+1) 2=2, ye=(0+4) 2=2,e point (2,2)(2) Draw the graph in the sub-coordinate system and judge the relationship between the number and position of the line segment de and the edge ab.

de ab, and de=2-(-2)=4, ab=3-(-5)=8, ab=2de.

Don't know what you're going to ask (1)m(2,3 2).

2) There are three cases: make a parallelogram with ab, ac, bc as hypotenuses, and use the midpoint of two diagonals to be the same, and calculate d(1,-1)(-3,5)(5,3).

Question 2 has three answers, d(5,3) d(-3,5) d(1,-1).

There is no prescribed order for the parallelogram, so it can be divided by ab as the side and diagonal, and the parallelogram diagonal is bisected with each other, and the midpoint coordinates can be found according to some coordinates, and then the midpoint coordinates can be used to find the coordinates of point d in turn.

Hello, the coordinates of point m are (2, 3, 2).

The coordinates of point d are (1,-1). It is obtained by using the coordinates of the midpoint of the line segment AB and the coordinates of the midpoint of CD equally.