math destroyer 2015

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    Math Destroyer problem

    hey guys! 2016, Test 11 #12 "Find the radius of the circle inscribed within an equilateral triangle whose side is of length 12" Answer: 2root3 Can someone please explain the solution for me? i've read it about 1o times already and I still don't know how they got this answer. Thank you!!!
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    For Sale DAT Destroyer and Math Destroyer 2015 combo

    Books are in good condition with some light markings in them. Already took the DAT and got into school, so I'm trying to get rid of them. $125
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