Question

The vertices of a rectangle are located at (-4, 5), (4, 5), (4, -5), and (-4, -5). What is the perimeter of the rectangle?


A)


38 units


B)


18 units


C)


36 units


D)


40 units

Answer 1

um

Answer 2

how do i work it out?

Answer 3

You can just count the distance along a side...

Along the top, it's just as if it were a number line. The y coordinate doesn't change at all, so you're counting from x = -4 over to x = 4. So that would be a distance of 8.

Answer 4

36 units?

Answer 5

You can count the length down a side in the same way... the x coordinate doesn't change, but y changes from 5 down to -5... a length of 10.

Yes, so as you found just now, it's 8 across top and bottom, or 16.... plus 10 down each side for 20...

Total perimeter = 36

Answer 6

You don't have to draw it if you realize that's how the points are arranged, but it's always fine to draw it if it helps you see it.

Answer 7

could you help with this one too?


Three vertices of a rectangle are located at A(-2, 2), B(2, -2), C(-2, -2). What are the coordinates of the fourth vertex?

Answer 8

2,2?

Answer 9

Yes, great :)