Big Ideas Math Geometry, 2014
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Big Ideas Math Geometry, 2014 View details
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Exercise 12 Page 198

Can you fold the hourglass over itself somehow?

2

Practice makes perfect
A way to think about lines of symmetry is if you are able to fold a figure along some line so that the two parts line up, then we have found a line of symmetry. For the hourglass there are two ways we can fold it that fits this criteria.