Question

What is the perimeter of the rectangle in the diagram?
http://contentlaunch.ple.platoweb.com/testimagedb/25/25bcf5ce7c84eba27a0252bbefdda1c7
A) 2(x2 – x2) + 2(y2 – y2)
B) (x2 – x2)(y2 – y2)
C) Square Root of 2(y2-y1)(x2-x1)
D) 4 square root of (y2-y1)to the second power (x2-x1) to the second power
E) 4(y2 – y2)(x2 – x2)

Answer 1

@rebeccaxhawaii I'm stuck

Answer 2

Someone... Please...?

Answer 3

you want to write the length of each side in terms of x1, x2, etc..

Answer 4

...?

Answer 5

You have me lost...

Answer 6

I'll do the left side as an example

if we wanted to find how long the left side is, we would subtract the y-coordinates

y2 - y1

Answer 7

O-Okay..?

Answer 8

perhaps it might be easier if I used numbers instead?

Answer 9

how long is the left side?

Answer 10

I-I don't know... I'm so lost and just... stressed

Answer 11

do you understand how the (x,y) coordinate system works?

Answer 12

... Barely

Answer 13

each point gets two numbers, x and y

(x,y)

the x tells us how far to the left or right we go
the y tells us how far up or down we go

with me so far?

Answer 14

Yes

Answer 15

if we have two points, and we want to find the distance between them, we can use subtraction

Answer 16

Alright