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OpenStudy (linn99123):
need help fast What is the perimeter of the triangle? A. 18 inches B. 12.5 inches C. 13.5 inches D. 9 inches http://static.k12.com/calms_media/media/1299500_1300000/1299563/1/8eb9696736b856d67465e674063857ec84c94029/143748.jpg
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OpenStudy (jdoe0001):
hmm what are those lines sticking from the sides?
OpenStudy (linn99123):
im not shure
OpenStudy (jdoe0001):
http://en.wikipedia.org/wiki/Hatch_mark <---- meaning all sides equal each other, so there's the perimeter
OpenStudy (jdoe0001):
sum them up
OpenStudy (anonymous):
4.5 + 4.5 + 4.5 = ...
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OpenStudy (anonymous):
(C. 13.5 inches)
OpenStudy (jdoe0001):
(C. 13.5 inches) \(\large \checkmark\)
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