Question

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

Answer 1

it's 19

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) :)