Question

PLEASE CHECK MY ANSWER! :):):)
Find the perimeter of a quadrilateral with vertices at C (−2, 4), D (−3, 1), E (1, 0), and F (−1, 2). Round your answer to the nearest hundredth when necessary.

10 units
10.77 units
11.52 units
12.35 units<--my answer

Answer 1

there are 2 ways to do this

1. distance formula
2. draw it out

I like to draw it out only because memorizing the formula can be hard

Answer 2

since its a quad we know it will have 4 sides

Answer 3

i used √(x2-x1)2+(y2-y1)2

Answer 4

yes, that would be correct( for the distance formula)

Answer 5

ok cool just making sure haha

Answer 6

now apply the distance formula to one of the sides. Lets say side CD

Answer 7

(x1,y1) = (-2.4) C
(x2,y2) = (-3,1) D

Answer 8

yes a quadrilateral means there are 4 sides
perimeter is the sum of all 4 lengths
use the distance formula as necessary to find the lengths
I like to do a sketch to "see" better

Answer 9

oh ok

Answer 10

so side CD will be \[\sqrt{10}\]

Answer 11

to round to the nearest hundredth calculate to 3 decimal places. if the 3rd digit is less than 5 drop, if 5 or more add 1 to the 2nd decimal place.

Answer 12

now do the same for every other side

Answer 13

like ur new picture!

Answer 14

oh thanks...

Answer 15

ok so i think i know what i did wrong..