Question:
A student wants to arrange four points to form a rectangle on a grid. She has already placed points at (-4. 4). (-4, 8). and (4, 8). Where should she place the last point?
Answer:
![D = (4,4)](https://tex.z-dn.net/?f=D%20%3D%20%284%2C4%29)
Step-by-step explanation:
Let the rectangle be ABCD
![A = (-4,4)](https://tex.z-dn.net/?f=A%20%3D%20%28-4%2C4%29)
![B= (-4,8)](https://tex.z-dn.net/?f=B%3D%20%28-4%2C8%29)
![C = (4,8)](https://tex.z-dn.net/?f=C%20%3D%20%284%2C8%29)
Required
Determine the location of the last point
A rectangle has the following coordinates
![A = (x_1,y_1)](https://tex.z-dn.net/?f=A%20%3D%20%28x_1%2Cy_1%29)
![B = (x_1,y_2)](https://tex.z-dn.net/?f=B%20%3D%20%28x_1%2Cy_2%29)
![C = (x_2,y_2)](https://tex.z-dn.net/?f=C%20%3D%20%28x_2%2Cy_2%29)
![D = (x_2,y_1)](https://tex.z-dn.net/?f=D%20%3D%20%28x_2%2Cy_1%29)
From the given coordinates:
--- see x coordinates of A and B
--- see x coordinates of C
--- see y coordinates of C
--- see y coordinates of B and C
So:
![D = (x_2,y_1)](https://tex.z-dn.net/?f=D%20%3D%20%28x_2%2Cy_1%29)
![x_2 = 4](https://tex.z-dn.net/?f=x_2%20%3D%204)
![y_1 =4](https://tex.z-dn.net/?f=y_1%20%3D4)
The coordinates of the last point (D) is:
![D = (4,4)](https://tex.z-dn.net/?f=D%20%3D%20%284%2C4%29)