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Posted by **Amy~** on Sunday, September 5, 2010 at 2:28pm.

the small pentagon has a side that is 3cm while the side on the other larger pentagon is 8cm.

the small pentagon has a side x cm while the same side on the larger pentagon is 5cm.

would i set up a proportion 3/x = 8/5

- Math Geometry -
**Amy~**, Sunday, September 5, 2010 at 2:29pmI think it is right

- Math Geometry -
**Reiny**, Sunday, September 5, 2010 at 3:01pmYou are correct if the two pentagons are similar.

You did not mention if they are.

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