Question

Compute the perimeter of the rectangle using the distance formula. (round to the nearest integer)
https://gyazo.com/e5b372412e70e08e03189628d77049e6
A) 22
B) 23
C) 38
D) 45

Answer 1

what a pain
you have to identify three points one the rectangle i got \((3,8)\)for one of them

Answer 2

Bottom angle is (8,3)

Answer 3

The one to the right is (11,6)

Answer 4

ok that is enough

Answer 5

do you know how to find the distance between \((3,8)\) and \((8,3)\)?

Answer 6

No.

Answer 7

you can use the distance formula, or just think

Answer 8

distance formula is \[\sqrt{x_2-x_1)^2+(y_2-y_1)^2}\]so for \[(8,3,), (3,8)\] it would be \[\sqrt{8-3)^2+(3-8)^2}=\sqrt{5^2+5^2}=\sqrt{50}\]

Answer 9

try it with \[(8,3),(11,6)\]

Answer 10

Working it now

Answer 11

I may have screwed it up.

Answer 12

It's 38.

Answer 13

Right?

Answer 14

hold on, got logged out

Answer 15

\[11-8=?\]

Answer 16

it is definitely not 38

Answer 17

Oh it's 23.

Answer 18

you mean the final answer? yes, that is what i got

Answer 19

i mean actually i got \[2(\sqrt{50}+\sqrt{18})\] but it rounded to 23

Answer 20

Right, thanks for the help.

Answer 21

yw