Question

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Find the perimeter of a quadrilateral with vertices at C (−1, 2), D (−2, −1), E (2, −2), and F (1, 1). Round your answer to the nearest hundredth when necessary.

10.92 units

12.68 units

13.43 units

18.27 units

Answer 1

Calculate distances
CD,DE,EF, and FC

Then add all to get perimeter

Formula:sqrt((x2-x1)^2+(y2-y1)^2)

Source: http://www.mathskey.com/question2answer/

Answer 2

okay hold on let me try

Answer 3

im confused on how to do this actually

Answer 4

C (−1, 2), D (−2, −1)
x1=-1,y1=2,x2=-2,y2=-1
CD= sqrt((-2-(-1))^2+(-1-2)^2)
=sqrt(1+9)
=sqrt10
Same as do remaining and add

Answer 5

alright give me a second to solve that

Answer 6

i actually cant do this haha, I'm too confused on how to add them and do all of that sqrt again I'm not taking this class so i wouldn't know.

Answer 7

I used the distance formula to find the length between each set of points. The distance between C and D, for example, came out to be sqrt10. DF came out to be sqrt17. You use the points in the formula like this: