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you have to do 7 squared + 13 squared = x squared. 7 squared is 49 + 13 squared which is 169. 169+49=x squared. 218= x squared. The square root of 218 is about 14.765. So the answer should be about 15cm if the missing side is the hypotnus (the diaganal side)

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Q: What the length missing of the triagle shape 7cm and 13 cm?
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