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Mathematics 24 Online
OpenStudy (anonymous):

How many edges are there? (see comments)

OpenStudy (anonymous):

OpenStudy (kinggeorge):

I'm getting 24. If you fold the squares up, ignoring the octagons on each side, you count the lines dividing each square. There are 8 of these lines. Now the octagons both have 8 edges, and they don't share any edges with each other, so we have 8+8 more edges for a total of 24.

OpenStudy (kinggeorge):

Notice that we don't have to count the edges of the squares, because those edges are shared with the edges of the octagons, and we've already counted those.

OpenStudy (anonymous):

Awesome. thank you

OpenStudy (kinggeorge):

You're welcome.

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