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In the plane rectangular coordinate system, a (- 2,0), B (0,1), C (0,4), take a, BC three points as the vertex to draw a parallelogram, then the fourth vertex
There are three kinds of parallelograms
1. If the parallelogram is ABCD, then the midpoint of AC (- 1,2) is the midpoint of BD, then d (- 2,3)
2. If the parallelogram is acbd, then the midpoint of AB (- 1,1 / 2) is the midpoint of AD, then d (- 2, - 3)
3. If the parallelogram is bacd, then the midpoint of BC (0,5 / 2) is the midpoint of AD, then d (2,5)
In the plane rectangular coordinate system, a (0,0), B (0, - 5), C (- 2, - 2) take these three points as the three vertices of the parallelogram to find the coordinates of the fourth vertex?
(2, - 3) or (- 2,3)
In the plane rectangular coordinate system, the coordinates of points a, B and C are (0,0), (0, - 5), (- 2, - 2) respectively. If these three points are the three vertices of the parallelogram, the fourth vertex cannot be in the third vertex______ Quadrant
If a parallelogram is made with ab as diagonal, AC and BC as sides, the fourth vertex is in the fourth quadrant; if a parallelogram is made with AC as diagonal, AB and BC as sides, the fourth vertex is in the second quadrant; if a parallelogram is made with CB as diagonal, AC and Ba as sides, the fourth vertex is in the third quadrant. Therefore, it is impossible to be in the first quadrant So the answer is: one
In the parallelogram ABCD, the coordinates of vertex a, B, C are (2, - 3, z), (- 1,3,2), (x, y, 2) respectively, and the intersection of diagonal is e (4, - 1,7). Find the coordinates of point D and the values of X, y, Z
If a and C are relative vertices and E is diagonal intersection, we can get (2 + x) / 2 = 4, (- 3 + y) / 2 = - 1, (Z + 2) / 2 = 7, so we can get x = 6, y = - 1, z = 12. Let the coordinates of the points be (E, F, g), we can get
e=2*4-(-1)=9,f=2*(-1)-3=-5,g=2*7-2=12
RELATED INFORMATIONS
- 1. The coordinates of vertex a, B, D of parallelogram ABCD are a (0,0), B (2,2), D (4, - 3), respectively. Find the coordinates of point C and the area of parallelogram ABCD
- 2. In the parallelogram ABCD, ∠ a = ∠ C, ∠ B = ∠ D, is the quadrilateral ABC a parallelogram Why?
- 3. As shown in the figure, the quadrilateral ABCD is a parallelogram, ∠ ADC = 125 ° and ∠ CAD = 21 ° to calculate the degree of ∠ ABC and ∠ cab
- 4. It is known that: as shown in the figure, in the rectangular coordinate system xoy, one side of RT △ OCD OC is on the X axis. ∠ C = 90 °, point D is in the first quadrant, OC = 3, DC = 4, and the image of the inverse scale function passes through the midpoint a of OD. (1) find the analytical formula of the inverse scale function; (2) if the image of the inverse scale function intersects with the other side of RT △ OCD DC at point B, find the analytical formula of the straight line of a and B
- 5. When m is the value, the focus of the line y = 5x + m on the line y = 3x-4 is on the x-axis?
- 6. As shown in the figure, the functional relations of lines OC and BC are Y1 = x and y2 = - 2x + 6, respectively. The moving point P (x, 0) moves on ob (0 < x < 3), and the line m passing through point P is perpendicular to the X axis. (1) find the coordinates of point C, and answer when x takes what value, Y1 > Y2? (2) Let the area of the left part of the line m in △ cob be s, and the functional relationship between S and X is obtained. (3) when x is what, the line m bisects the area of △ cob?
- 7. Given the function y = Y1 + Y2, and Y1 = 2x + m, y2 = x / (m-1) + 3, the ordinate of the image focus of the two functions Y1 and Y2 is 4
- 8. Draw the image of function y = 3x-15, observe the image and answer: when x = what value, y = 0? Y > 0? Y < 0? Must be a graph,
- 9. （3x-4)^2=9X-12
- 10. How to solve 9x-12 * 2 = 3x
- 11. How many parallelograms can be made by taking three points not on the same line as three vertices?
- 12. Take three points a, B and C which are not on the same line as the three vertices to make parallelograms with different shapes. A total of () A. 1 B. 2 C. 3 d. 4
- 13. Take a (0,0), B (4,0) C (2,3) as the vertex to draw a parallelogram and the coordinates of the fourth vertex D of the ball
- 14. There are several parallelograms whose vertices are three points a, B and C which are not on a straight line A. 1 B.2 C.3 D.4
- 15. If it is known that a, B and C are not on the same line, then the parallelogram with the three points as the vertex has the same property
- 16. In the quadrilateral ABCD, it is known that angle A and angle c complement each other, and angle B is 15 degrees larger than angle D, then angle B =? Angle d =?
- 17. If in the quadrilateral ABCD, the degree of a + C is equal to () A. 108°B. 180°C. 144°D. 216°
- 18. In quadrilateral ABCD, angle A and angle c complement each other. If angle A and angle B are equal to 6:4:5 than angle D, calculate the degree of angle C Urgent````
- 19. Given a (0,3), B (- 1,0), C (3,0), the coordinates of point D are determined to make the quadrilateral ABCD an isosceles trapezoid
- 20. Given the vertices a (0, - 9), B (2,6), C (4,5) of the parallelogram ABCD, we can find the coordinates of the fourth fixed point D