I'm not too sure on this can i have some

p.s. i'm very new to this app i just downloaded it

Welcome to . We are here to help! 

Similar polygons vary directly with each other. They have the same scale.

Something I notice about the polygons is that both of the sides are decreased by 10.

40-30= 10 and 28-18=10

Try to find the scale.

40/28= 1.42857

30/18= 1.666666777

I would say these are not similar polygons. They do not share the same scale.

I hope this helps!
~kaikers

0.3

Step-by-step explanation:

if ur referring it by decimals that would be it because ur multiplying then improvising.