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the polygons are similar find the missing length

The Polygons Are Similar Find The Missing Length class=

Answer :

DESANIAMIYA101GO DESANIAMIYA101GO

Answer: 12

Step-by-step explanation:

Since they are similar, the ratio of corresponding sides is constant

[tex]\frac{21}{28} = \frac{9}{x}[/tex]

cross multiply

21x = 252

x = 12

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