Instructions: the polygons in each pair are similar. find the missing side length.

it's 19

Step-by-step explanation:

18 - 3 = 15

so the difference between them is 15

so since you wanna fine the "?" on the right, you would add 4+15, which gives you 19

(also 3 and 4 four are only one number apart, so you could have just added (+1) to 18) :)

your answer is the frist one

hop i