Respuesta :

Aisin

We see, there is a pair of sides that have similar lengths before and after the enlargement.

-> The scale factor = 30 : 18 (or) 35 : 21 = 5/3

Recheck :

18 x 5/3 = 30
18 x 5/3 = 30
21 x 5/3 = 35

Answer:

20 i think so

Step-by-step explanation:

mabye help full

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