Question

Find the perimeter of WXYZ. Round to the nearest tenth if necessary.

130
3.7
21.9
21.3
I think it's 21.3 but I'm not sure. It could be 21.9 also.

Answer 1

@skatergirl147

Answer 2

@aziaboo45

Answer 3

Use distance forumla. \[\frac{ (y2-y1) }{(x2-x1) }\]
On each line. WX, XY, YZ, ZW. Make sense?

Answer 4

Then you would add those distances together to get the perimeter.

Answer 5

I'll help you on line WX.

y2= 4
y1 = 2
x2 = -1
x1 = 1.

Y2-Y1 = 2
X2-X1 = -2

2/-2 = -1

Answer 6

Now you would do this for the remaining 3 lines and add there values together.

Answer 7

It would be 3.7, correct? @ltrout

Answer 8

Oops, nevermind. It's 21.9!

Answer 9

Goodjob! That's correct! :)