Is there a picture we can use
Answer:

Step-by-step explanation:
In order to find the length of the missing side here, we must note that these triangles are similar.
Therefore their lengths are proportionate to each other.
So,

We can solve for x by cross multiplying.

Hope this helped!
First you find the middle then you measure the other side
are you sure this is not a joke this is very easy
Answer:
18ft
Step-by-step explanation:
just add all the sides. since it’s a rectangle, you there is 2 sides that’s 3ft long and that are 6ft long. so you would do 3+3+6+6
You will need to run around 10 times because 3000m is 3km and 300*10 is 3000 :) i hope i helped