Question

Step 4: By the definition of similar polygons, the lengths of corresponding sides are __________. This means that "OK" /"NL" " = " "KM" /"LM" .

Substituting in the lengths, we get "12" /"8" " = " "20 + x" /"x" .
Cross multiply and solve the proportion for x.

Answer 1

x=40

Explanation:

the guy above is correct because i just did this question and got it right

Answer 2

the blank should be proportional.

`(12)/(8) = (20 + x)/(x) \\ 12x = 160 + 8x \\ 4x = 160 \\ x = 40`